23305631 has 2 divisors, whose sum is σ = 23305632. Its totient is φ = 23305630.

The previous prime is 23305627. The next prime is 23305651. The reversal of 23305631 is 13650332.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23305631 - 2² = 23305627 is a prime.

It is a super-2 number, since 2×23305631² = 1086304872616322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23305597 and 23305606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23305651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11652815 + 11652816.

It is an arithmetic number, because the mean of its divisors is an integer number (11652816).

Almost surely, 2^23305631 is an apocalyptic number.

23305631 is a deficient number, since it is larger than the sum of its proper divisors (1).

23305631 is an equidigital number, since it uses as much as digits as its factorization.

23305631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 23305631 is about 4827.5905998748. The cubic root of 23305631 is about 285.6408315102.

Adding to 23305631 its reverse (13650332), we get a palindrome (36955963).

The spelling of 23305631 in words is "twenty-three million, three hundred five thousand, six hundred thirty-one".