23538215 has 4 divisors (see below), whose sum is σ = 28245864. Its totient is φ = 18830568.

The previous prime is 23538209. The next prime is 23538241. The reversal of 23538215 is 51283532.

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 23538215 - 2²⁰ = 22489639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2353817 + ... + 2353826.

It is an arithmetic number, because the mean of its divisors is an integer number (7061466).

Almost surely, 2^23538215 is an apocalyptic number.

23538215 is a deficient number, since it is larger than the sum of its proper divisors (4707649).

23538215 is an equidigital number, since it uses as much as digits as its factorization.

23538215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4707648.

The product of its digits is 7200, while the sum is 29.

The square root of 23538215 is about 4851.6198325920. The cubic root of 23538215 is about 286.5878944973.

The spelling of 23538215 in words is "twenty-three million, five hundred thirty-eight thousand, two hundred fifteen".