216304026525 has 144 divisors (see below), whose sum is σ = 398354628672. Its totient is φ = 112170240000.

The previous prime is 216304026511. The next prime is 216304026551. The reversal of 216304026525 is 525620403612.

216304026525 is a `hidden beast` number, since 216 + 30 + 402 + 6 + 5 + 2 + 5 = 666.

It is not a de Polignac number, because 216304026525 - 2⁶ = 216304026461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216304026525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 336397854 + ... + 336398496.

It is an arithmetic number, because the mean of its divisors is an integer number (2766351588).

Almost surely, 2^216304026525 is an apocalyptic number.

216304026525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216304026525 is a deficient number, since it is larger than the sum of its proper divisors (182050602147).

216304026525 is a wasteful number, since it uses less digits than its factorization.

216304026525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 996 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 216304026525 in words is "two hundred sixteen billion, three hundred four million, twenty-six thousand, five hundred twenty-five".