23545531 has 2 divisors, whose sum is σ = 23545532. Its totient is φ = 23545530.

The previous prime is 23545519. The next prime is 23545549. The reversal of 23545531 is 13554532.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23545531 - 2¹¹ = 23543483 is a prime.

It is a super-2 number, since 2×23545531² = 1108784060143922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23545531.

It is not a weakly prime, because it can be changed into another prime (23545631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11772765 + 11772766.

It is an arithmetic number, because the mean of its divisors is an integer number (11772766).

Almost surely, 2^23545531 is an apocalyptic number.

23545531 is a deficient number, since it is larger than the sum of its proper divisors (1).

23545531 is an equidigital number, since it uses as much as digits as its factorization.

23545531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 28.

The square root of 23545531 is about 4852.3737490016. The cubic root of 23545531 is about 286.6175832375.

Subtracting from 23545531 its reverse (13554532), we obtain a palindrome (9990999).

The spelling of 23545531 in words is "twenty-three million, five hundred forty-five thousand, five hundred thirty-one".