23440051 has 4 divisors (see below), whose sum is σ = 23837400. Its totient is φ = 23042704.

The previous prime is 23440037. The next prime is 23440063. The reversal of 23440051 is 15004432.

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 23440051 - 2¹⁷ = 23308979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23440951) 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, 198586 + ... + 198703.

It is an arithmetic number, because the mean of its divisors is an integer number (5959350).

Almost surely, 2^23440051 is an apocalyptic number.

23440051 is a deficient number, since it is larger than the sum of its proper divisors (397349).

23440051 is an equidigital number, since it uses as much as digits as its factorization.

23440051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397348.

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

The square root of 23440051 is about 4841.4926417377. The cubic root of 23440051 is about 286.1889430742.

Adding to 23440051 its reverse (15004432), we get a palindrome (38444483).

The spelling of 23440051 in words is "twenty-three million, four hundred forty thousand, fifty-one".