23253531 has 16 divisors (see below), whose sum is σ = 35526144. Its totient is φ = 13253184.

The previous prime is 23253523. The next prime is 23253541. The reversal of 23253531 is 13535232.

It is a happy number.

It is not a de Polignac number, because 23253531 - 2³ = 23253523 is a prime.

It is a super-2 number, since 2×23253531² = 1081453407935922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23253541) 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, 8386 + ... + 10808.

It is an arithmetic number, because the mean of its divisors is an integer number (2220384).

Almost surely, 2^23253531 is an apocalyptic number.

23253531 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23253531 is a deficient number, since it is larger than the sum of its proper divisors (12272613).

23253531 is a wasteful number, since it uses less digits than its factorization.

23253531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890.

The product of its digits is 2700, while the sum is 24.

The square root of 23253531 is about 4822.1915142391. The cubic root of 23253531 is about 285.4278216063.

Adding to 23253531 its reverse (13535232), we get a palindrome (36788763).

The spelling of 23253531 in words is "twenty-three million, two hundred fifty-three thousand, five hundred thirty-one".