23155977 has 32 divisors (see below), whose sum is σ = 34836480. Its totient is φ = 13584960.

The previous prime is 23155919. The next prime is 23155981. The reversal of 23155977 is 77955132.

It is not a de Polignac number, because 23155977 - 2⁷ = 23155849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (23155987) 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, 129274 + ... + 129452.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^23155977 is an apocalyptic number.

It is an amenable number.

23155977 is a deficient number, since it is larger than the sum of its proper divisors (11680503).

23155977 is a wasteful number, since it uses less digits than its factorization.

23155977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333.

The product of its digits is 66150, while the sum is 39.

The square root of 23155977 is about 4812.0657726178. The cubic root of 23155977 is about 285.0281166474.

The spelling of 23155977 in words is "twenty-three million, one hundred fifty-five thousand, nine hundred seventy-seven".