525809980 has 24 divisors (see below), whose sum is σ = 1117508112. Its totient is φ = 207789312.

The previous prime is 525809957. The next prime is 525809989. The reversal of 525809980 is 89908525.

It is a super-2 number, since 2×525809980² = 552952270135200800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 525809980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525809989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156717 + ... + 160036.

It is an arithmetic number, because the mean of its divisors is an integer number (46562838).

Almost surely, 2^525809980 is an apocalyptic number.

It is an amenable number.

525809980 is an abundant number, since it is smaller than the sum of its proper divisors (591698132).

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

525809980 is a wasteful number, since it uses less digits than its factorization.

525809980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316845 (or 316843 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 46.

The square root of 525809980 is about 22930.5468752928. The cubic root of 525809980 is about 807.1289812456.

The spelling of 525809980 in words is "five hundred twenty-five million, eight hundred nine thousand, nine hundred eighty".