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20022231 = 323932789
BaseRepresentation
bin100110001100…
…0001111010111
31101200020100010
41030120033113
520111202411
61553051303
7332120565
oct114301727
941606303
1020022231
1110335aa9
126856b33
1341c0598
142932a35
151b577a6
hex13183d7

20022231 has 8 divisors (see below), whose sum is σ = 26717040. Its totient is φ = 13337792.

The previous prime is 20022229. The next prime is 20022239. The reversal of 20022231 is 13222002.

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 20022231 - 21 = 20022229 is a prime.

It is a super-2 number, since 2×200222312 = 801779468434722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022239) 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, 5785 + ... + 8573.

It is an arithmetic number, because the mean of its divisors is an integer number (3339630).

Almost surely, 220022231 is an apocalyptic number.

20022231 is a deficient number, since it is larger than the sum of its proper divisors (6694809).

20022231 is a wasteful number, since it uses less digits than its factorization.

20022231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20022231 is about 4474.6207660538. The cubic root of 20022231 is about 271.5422981150.

Adding to 20022231 its reverse (13222002), we get a palindrome (33244233).

The spelling of 20022231 in words is "twenty million, twenty-two thousand, two hundred thirty-one".

Divisors: 1 3 2393 2789 7179 8367 6674077 20022231