52421515 has 16 divisors (see below), whose sum is σ = 64820448. Its totient is φ = 40674816.

The previous prime is 52421483. The next prime is 52421521. The reversal of 52421515 is 51512425.

It is a cyclic number.

It is not a de Polignac number, because 52421515 - 2⁵ = 52421483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52421515.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32979 + ... + 34531.

It is an arithmetic number, because the mean of its divisors is an integer number (4051278).

Almost surely, 2^52421515 is an apocalyptic number.

52421515 is a deficient number, since it is larger than the sum of its proper divisors (12398933).

52421515 is a wasteful number, since it uses less digits than its factorization.

52421515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758.

The product of its digits is 2000, while the sum is 25.

The square root of 52421515 is about 7240.2703678799. The cubic root of 52421515 is about 374.2569345082.

The spelling of 52421515 in words is "fifty-two million, four hundred twenty-one thousand, five hundred fifteen".