23555251 has 4 divisors (see below), whose sum is σ = 24940872. Its totient is φ = 22169632.

The previous prime is 23555237. The next prime is 23555263. The reversal of 23555251 is 15255532.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23555251 - 2¹⁵ = 23522483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23555281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692785 + ... + 692818.

It is an arithmetic number, because the mean of its divisors is an integer number (6235218).

Almost surely, 2^23555251 is an apocalyptic number.

23555251 is a deficient number, since it is larger than the sum of its proper divisors (1385621).

23555251 is a wasteful number, since it uses less digits than its factorization.

23555251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385620.

The product of its digits is 7500, while the sum is 28.

The square root of 23555251 is about 4853.3752173101. The cubic root of 23555251 is about 286.6570180335.

The spelling of 23555251 in words is "twenty-three million, five hundred fifty-five thousand, two hundred fifty-one".