23402251 has 4 divisors (see below), whose sum is σ = 24778872. Its totient is φ = 22025632.

The previous prime is 23402231. The next prime is 23402257. The reversal of 23402251 is 15220432.

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

It is a cyclic number.

It is not a de Polignac number, because 23402251 - 2⁵ = 23402219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23402257) 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, 688285 + ... + 688318.

It is an arithmetic number, because the mean of its divisors is an integer number (6194718).

Almost surely, 2^23402251 is an apocalyptic number.

23402251 is a deficient number, since it is larger than the sum of its proper divisors (1376621).

23402251 is a wasteful number, since it uses less digits than its factorization.

23402251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376620.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 23402251 is about 4837.5873118736. The cubic root of 23402251 is about 286.0350218739.

Adding to 23402251 its reverse (15220432), we get a palindrome (38622683).

It can be divided in two parts, 23402 and 251, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 23402251 in words is "twenty-three million, four hundred two thousand, two hundred fifty-one".