23306157 has 32 divisors (see below), whose sum is σ = 39686400. Its totient is φ = 13241664.

The previous prime is 23306149. The next prime is 23306177. The reversal of 23306157 is 75160332.

It is a happy number.

It is not a de Polignac number, because 23306157 - 2³ = 23306149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 23306157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23306117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59719 + ... + 60107.

It is an arithmetic number, because the mean of its divisors is an integer number (1240200).

Almost surely, 2^23306157 is an apocalyptic number.

23306157 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

23306157 is a deficient number, since it is larger than the sum of its proper divisors (16380243).

23306157 is a wasteful number, since it uses less digits than its factorization.

23306157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 23306157 is about 4827.6450780893. The cubic root of 23306157 is about 285.6429804321.

Adding to 23306157 its reverse (75160332), we get a palindrome (98466489).

The spelling of 23306157 in words is "twenty-three million, three hundred six thousand, one hundred fifty-seven".