23012215 has 4 divisors (see below), whose sum is σ = 27614664. Its totient is φ = 18409768.

The previous prime is 23012191. The next prime is 23012219. The reversal of 23012215 is 51221032.

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 23012215 - 2¹⁵ = 22979447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23012219) 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, 2301217 + ... + 2301226.

It is an arithmetic number, because the mean of its divisors is an integer number (6903666).

Almost surely, 2^23012215 is an apocalyptic number.

23012215 is a deficient number, since it is larger than the sum of its proper divisors (4602449).

23012215 is an equidigital number, since it uses as much as digits as its factorization.

23012215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602448.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 23012215 is about 4797.1048560564. The cubic root of 23012215 is about 284.4370337640.

Adding to 23012215 its reverse (51221032), we get a palindrome (74233247).

The spelling of 23012215 in words is "twenty-three million, twelve thousand, two hundred fifteen".