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22331131 = 29770039
BaseRepresentation
bin101010100101…
…1111011111011
31120000112112221
41111023323323
521204044011
62114344511
7360545224
oct125137373
946015487
1022331131
1111672789
12758b137
13481b4b4
142d7424b
151e61971
hex154befb

22331131 has 4 divisors (see below), whose sum is σ = 23101200. Its totient is φ = 21561064.

The previous prime is 22331053. The next prime is 22331159. The reversal of 22331131 is 13113322.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22331131 - 27 = 22331003 is a prime.

It is a super-2 number, since 2×223311312 = 997358823478322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22331161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384991 + ... + 385048.

It is an arithmetic number, because the mean of its divisors is an integer number (5775300).

Almost surely, 222331131 is an apocalyptic number.

22331131 is a deficient number, since it is larger than the sum of its proper divisors (770069).

22331131 is an equidigital number, since it uses as much as digits as its factorization.

22331131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770068.

The product of its digits is 108, while the sum is 16.

The square root of 22331131 is about 4725.5826095837. The cubic root of 22331131 is about 281.6027596027.

Adding to 22331131 its reverse (13113322), we get a palindrome (35444453).

It can be divided in two parts, 2233 and 1131, that added together give a square (3364 = 582).

The spelling of 22331131 in words is "twenty-two million, three hundred thirty-one thousand, one hundred thirty-one".

Divisors: 1 29 770039 22331131