23215051 has 4 divisors (see below), whose sum is σ = 24015600. Its totient is φ = 22414504.

The previous prime is 23215009. The next prime is 23215079. The reversal of 23215051 is 15051232.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23215051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23215091) 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, 400231 + ... + 400288.

It is an arithmetic number, because the mean of its divisors is an integer number (6003900).

Almost surely, 2^23215051 is an apocalyptic number.

23215051 is a deficient number, since it is larger than the sum of its proper divisors (800549).

23215051 is an equidigital number, since it uses as much as digits as its factorization.

23215051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800548.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 23215051 is about 4818.1999750944. The cubic root of 23215051 is about 285.2702924619.

Adding to 23215051 its reverse (15051232), we get a palindrome (38266283).

The spelling of 23215051 in words is "twenty-three million, two hundred fifteen thousand, fifty-one".