23806531 has 16 divisors (see below), whose sum is σ = 27934720. Its totient is φ = 19867680.

The previous prime is 23806529. The next prime is 23806547. The reversal of 23806531 is 13560832.

It is not a de Polignac number, because 23806531 - 2¹ = 23806529 is a prime.

It is a super-2 number, since 2×23806531² = 1133501836507922, 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 23806531.

It is not an unprimeable number, because it can be changed into a prime (23806591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54010 + ... + 54448.

It is an arithmetic number, because the mean of its divisors is an integer number (1745920).

Almost surely, 2^23806531 is an apocalyptic number.

23806531 is a deficient number, since it is larger than the sum of its proper divisors (4128189).

23806531 is a wasteful number, since it uses less digits than its factorization.

23806531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 23806531 is about 4879.1936833866. The cubic root of 23806531 is about 287.6727370263.

It can be divided in two parts, 2380 and 6531, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 23806531 in words is "twenty-three million, eight hundred six thousand, five hundred thirty-one".