52509615 has 12 divisors (see below), whose sum is σ = 84060312. Its totient is φ = 27990160.

The previous prime is 52509601. The next prime is 52509619. The reversal of 52509615 is 51690525.

It is not a de Polignac number, because 52509615 - 2⁷ = 52509487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52509619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27130 + ... + 29000.

It is an arithmetic number, because the mean of its divisors is an integer number (7005026).

Almost surely, 2^52509615 is an apocalyptic number.

52509615 is a deficient number, since it is larger than the sum of its proper divisors (31550697).

52509615 is an frugal number, since it uses more digits than its factorization.

52509615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750 (or 1879 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 52509615 is about 7246.3518407541. The cubic root of 52509615 is about 374.4664768570.

Multiplying 52509615 by its product of nonzero digits (13500), we get a square (708879802500 = 841950²).

The spelling of 52509615 in words is "fifty-two million, five hundred nine thousand, six hundred fifteen".