53215015 has 24 divisors (see below), whose sum is σ = 77540832. Its totient is φ = 34337280.

The previous prime is 53215009. The next prime is 53215033. The reversal of 53215015 is 51051235.

It is not a de Polignac number, because 53215015 - 2²¹ = 51117863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7485 + ... + 12745.

It is an arithmetic number, because the mean of its divisors is an integer number (3230868).

Almost surely, 2^53215015 is an apocalyptic number.

53215015 is a deficient number, since it is larger than the sum of its proper divisors (24325817).

53215015 is a wasteful number, since it uses less digits than its factorization.

53215015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5307 (or 5290 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 53215015 is about 7294.8622331063. The cubic root of 53215015 is about 376.1358509217.

The spelling of 53215015 in words is "fifty-three million, two hundred fifteen thousand, fifteen".