23015215 has 4 divisors (see below), whose sum is σ = 27618264. Its totient is φ = 18412168.

The previous prime is 23015207. The next prime is 23015233. The reversal of 23015215 is 51251032.

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 23015215 - 2³ = 23015207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23015192 and 23015201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2301517 + ... + 2301526.

It is an arithmetic number, because the mean of its divisors is an integer number (6904566).

Almost surely, 2^23015215 is an apocalyptic number.

23015215 is a deficient number, since it is larger than the sum of its proper divisors (4603049).

23015215 is an equidigital number, since it uses as much as digits as its factorization.

23015215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4603048.

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

The square root of 23015215 is about 4797.4175344658. The cubic root of 23015215 is about 284.4493934901.

Adding to 23015215 its reverse (51251032), we get a palindrome (74266247).

The spelling of 23015215 in words is "twenty-three million, fifteen thousand, two hundred fifteen".