216257525 has 24 divisors (see below), whose sum is σ = 307941600. Its totient is φ = 148996800.

The previous prime is 216257507. The next prime is 216257537. The reversal of 216257525 is 525752612.

It is not a de Polignac number, because 216257525 - 2¹⁴ = 216241141 is a prime.

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, 15470 + ... + 25919.

It is an arithmetic number, because the mean of its divisors is an integer number (12830900).

Almost surely, 2^216257525 is an apocalyptic number.

216257525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216257525 is a deficient number, since it is larger than the sum of its proper divisors (91684075).

216257525 is a wasteful number, since it uses less digits than its factorization.

216257525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41429 (or 41424 counting only the distinct ones).

The product of its digits is 42000, while the sum is 35.

The square root of 216257525 is about 14705.6970253028. The cubic root of 216257525 is about 600.2383543735.

The spelling of 216257525 in words is "two hundred sixteen million, two hundred fifty-seven thousand, five hundred twenty-five".