23328531 has 12 divisors (see below), whose sum is σ = 33893808. Its totient is φ = 15461424.

The previous prime is 23328521. The next prime is 23328553. The reversal of 23328531 is 13582332.

It is not a de Polignac number, because 23328531 - 2¹¹ = 23326483 is a prime.

It is a super-2 number, since 2×23328531² = 1088440717235922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23328495 and 23328504.

It is not an unprimeable number, because it can be changed into a prime (23328521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5935 + ... + 9048.

It is an arithmetic number, because the mean of its divisors is an integer number (2824484).

Almost surely, 2^23328531 is an apocalyptic number.

23328531 is a deficient number, since it is larger than the sum of its proper divisors (10565277).

23328531 is a wasteful number, since it uses less digits than its factorization.

23328531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15162 (or 15159 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 23328531 is about 4829.9618010912. The cubic root of 23328531 is about 285.7343573161.

The spelling of 23328531 in words is "twenty-three million, three hundred twenty-eight thousand, five hundred thirty-one".