52515405 has 16 divisors (see below), whose sum is σ = 93360960. Its totient is φ = 28008144.

The previous prime is 52515391. The next prime is 52515439. The reversal of 52515405 is 50451525.

52515405 is a `hidden beast` number, since 5 + 251 + 5 + 405 = 666.

It is not a de Polignac number, because 52515405 - 2⁷ = 52515277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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, 194367 + ... + 194636.

It is an arithmetic number, because the mean of its divisors is an integer number (5835060).

Almost surely, 2^52515405 is an apocalyptic number.

It is an amenable number.

52515405 is a deficient number, since it is larger than the sum of its proper divisors (40845555).

52515405 is a wasteful number, since it uses less digits than its factorization.

52515405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389017 (or 389011 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 52515405 is about 7246.7513411183. The cubic root of 52515405 is about 374.4802399314.

The spelling of 52515405 in words is "fifty-two million, five hundred fifteen thousand, four hundred five".