525556990 has 32 divisors (see below), whose sum is σ = 1084259520. Its totient is φ = 179672064.

The previous prime is 525556987. The next prime is 525557017. The reversal of 525556990 is 99655525.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 525556990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14076 + ... + 35344.

It is an arithmetic number, because the mean of its divisors is an integer number (33883110).

Almost surely, 2^525556990 is an apocalyptic number.

525556990 is an abundant number, since it is smaller than the sum of its proper divisors (558702530).

525556990 is a wasteful number, since it uses less digits than its factorization.

525556990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21636.

The product of its (nonzero) digits is 607500, while the sum is 46.

The square root of 525556990 is about 22925.0297709730. The cubic root of 525556990 is about 806.9995122190. Note that the first 3 decimals are identical.

The spelling of 525556990 in words is "five hundred twenty-five million, five hundred fifty-six thousand, nine hundred ninety".