23287231 has 16 divisors (see below), whose sum is σ = 26800128. Its totient is φ = 20037600.

The previous prime is 23287211. The next prime is 23287283. The reversal of 23287231 is 13278232.

It is not a de Polignac number, because 23287231 - 2¹¹ = 23285183 is a prime.

It is a super-2 number, since 2×23287231² = 1084590255294722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23287231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23287211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15301 + ... + 16753.

It is an arithmetic number, because the mean of its divisors is an integer number (1675008).

Almost surely, 2^23287231 is an apocalyptic number.

23287231 is a deficient number, since it is larger than the sum of its proper divisors (3512897).

23287231 is a wasteful number, since it uses less digits than its factorization.

23287231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542.

The product of its digits is 4032, while the sum is 28.

The square root of 23287231 is about 4825.6845110305. The cubic root of 23287231 is about 285.5656397382.

It can be divided in two parts, 232872 and 31, that added together give a triangular number (232903 = T₆₈₂).

The spelling of 23287231 in words is "twenty-three million, two hundred eighty-seven thousand, two hundred thirty-one".