525216978 has 48 divisors (see below), whose sum is σ = 1336922496. Its totient is φ = 146913120.

The previous prime is 525216971. The next prime is 525217001. The reversal of 525216978 is 879612525.

525216978 is a `hidden beast` number, since 52 + 521 + 6 + 9 + 78 = 666.

It is not an unprimeable number, because it can be changed into a prime (525216971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99450 + ... + 104597.

It is an arithmetic number, because the mean of its divisors is an integer number (27852552).

Almost surely, 2^525216978 is an apocalyptic number.

525216978 is an abundant number, since it is smaller than the sum of its proper divisors (811705518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

525216978 is a wasteful number, since it uses less digits than its factorization.

525216978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204079 (or 204076 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 525216978 is about 22917.6128338010. The cubic root of 525216978 is about 806.8254437436.

The spelling of 525216978 in words is "five hundred twenty-five million, two hundred sixteen thousand, nine hundred seventy-eight".