20125231 has 12 divisors (see below), whose sum is σ = 24168000. Its totient is φ = 16692480.

The previous prime is 20125177. The next prime is 20125241. The reversal of 20125231 is 13252102.

It is not a de Polignac number, because 20125231 - 2⁷ = 20125103 is a prime.

It is a super-2 number, since 2×20125231² = 810049845606722, 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 (20125241) 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 11 ways as a sum of consecutive naturals, for example, 5106 + ... + 8143.

It is an arithmetic number, because the mean of its divisors is an integer number (2014000).

Almost surely, 2^20125231 is an apocalyptic number.

20125231 is a deficient number, since it is larger than the sum of its proper divisors (4042769).

20125231 is a wasteful number, since it uses less digits than its factorization.

20125231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13294 (or 13287 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20125231 is about 4486.1153574111. The cubic root of 20125231 is about 272.0071319857.

Adding to 20125231 its reverse (13252102), we get a palindrome (33377333).

The spelling of 20125231 in words is "twenty million, one hundred twenty-five thousand, two hundred thirty-one".