23155725 has 24 divisors (see below), whose sum is σ = 39104640. Its totient is φ = 12085120.

The previous prime is 23155723. The next prime is 23155757. The reversal of 23155725 is 52755132.

It is not a de Polignac number, because 23155725 - 2¹ = 23155723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23155692 and 23155701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23155723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241 + ... + 6809.

It is an arithmetic number, because the mean of its divisors is an integer number (1629360).

Almost surely, 2^23155725 is an apocalyptic number.

23155725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23155725 is a deficient number, since it is larger than the sum of its proper divisors (15948915).

23155725 is a wasteful number, since it uses less digits than its factorization.

23155725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6629 (or 6624 counting only the distinct ones).

The product of its digits is 10500, while the sum is 30.

The square root of 23155725 is about 4812.0395883658. The cubic root of 23155725 is about 285.0270826833.

The spelling of 23155725 in words is "twenty-three million, one hundred fifty-five thousand, seven hundred twenty-five".