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22813493 = 237091399
BaseRepresentation
bin101011100000…
…1101100110101
31120221001020012
41113001230311
521320012433
62132550005
7364624433
oct127015465
946831205
1022813493
111197212a
127782305
134959c11
14305bd53
152009848
hex15c1b35

22813493 has 8 divisors (see below), whose sum is σ = 23856000. Its totient is φ = 21775248.

The previous prime is 22813487. The next prime is 22813499. The reversal of 22813493 is 39431822.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22813487) and next prime (22813499).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22813493 - 28 = 22813237 is a prime.

It is a super-2 number, since 2×228134932 = 1040910925722098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22813499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15608 + ... + 17006.

It is an arithmetic number, because the mean of its divisors is an integer number (2982000).

Almost surely, 222813493 is an apocalyptic number.

22813493 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

22813493 is a deficient number, since it is larger than the sum of its proper divisors (1042507).

22813493 is a wasteful number, since it uses less digits than its factorization.

22813493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131.

The product of its digits is 10368, while the sum is 32.

The square root of 22813493 is about 4776.3472444955. The cubic root of 22813493 is about 283.6159135405.

The spelling of 22813493 in words is "twenty-two million, eight hundred thirteen thousand, four hundred ninety-three".

Divisors: 1 23 709 1399 16307 32177 991891 22813493