23455557 has 24 divisors (see below), whose sum is σ = 36171200. Its totient is φ = 14603328.

The previous prime is 23455543. The next prime is 23455559. The reversal of 23455557 is 75555432.

It is not a de Polignac number, because 23455557 - 2⁴ = 23455541 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23455559) 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, 11544 + ... + 13422.

Almost surely, 2^23455557 is an apocalyptic number.

It is an amenable number.

23455557 is a deficient number, since it is larger than the sum of its proper divisors (12715643).

23455557 is a wasteful number, since it uses less digits than its factorization.

23455557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977 (or 1974 counting only the distinct ones).

The product of its digits is 105000, while the sum is 36.

The square root of 23455557 is about 4843.0937426401. The cubic root of 23455557 is about 286.2520354794.

The spelling of 23455557 in words is "twenty-three million, four hundred fifty-five thousand, five hundred fifty-seven".