23155215 has 16 divisors (see below), whose sum is σ = 37114848. Its totient is φ = 12327296.

The previous prime is 23155213. The next prime is 23155217. The reversal of 23155215 is 51255132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23155213) and next prime (23155217).

It is a cyclic number.

It is not a de Polignac number, because 23155215 - 2¹ = 23155213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23155213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10597 + ... + 12593.

It is an arithmetic number, because the mean of its divisors is an integer number (2319678).

Almost surely, 2^23155215 is an apocalyptic number.

23155215 is a deficient number, since it is larger than the sum of its proper divisors (13959633).

23155215 is a wasteful number, since it uses less digits than its factorization.

23155215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778.

The product of its digits is 1500, while the sum is 24.

The square root of 23155215 is about 4811.9865959913. The cubic root of 23155215 is about 285.0249901140.

The spelling of 23155215 in words is "twenty-three million, one hundred fifty-five thousand, two hundred fifteen".