53218525 has 24 divisors (see below), whose sum is σ = 69960800. Its totient is φ = 40046400.

The previous prime is 53218507. The next prime is 53218541. The reversal of 53218525 is 52581235.

53218525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53218525 - 2²¹ = 51121373 is a prime.

It is a super-2 number, since 2×53218525² = 5664422806351250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85666 + ... + 86284.

Almost surely, 2^53218525 is an apocalyptic number.

It is an amenable number.

53218525 is a deficient number, since it is larger than the sum of its proper divisors (16742275).

53218525 is a wasteful number, since it uses less digits than its factorization.

53218525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829 (or 824 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 53218525 is about 7295.1028094195. The cubic root of 53218525 is about 376.1441205665.

The spelling of 53218525 in words is "fifty-three million, two hundred eighteen thousand, five hundred twenty-five".