90532557 has 12 divisors (see below), whose sum is σ = 130852800. Its totient is φ = 60316488.

The previous prime is 90532529. The next prime is 90532579. The reversal of 90532557 is 75523509.

It is not a de Polignac number, because 90532557 - 2²² = 86338253 is a prime.

It is a super-2 number, since 2×90532557² = 16392287753916498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90531557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22428 + ... + 26154.

It is an arithmetic number, because the mean of its divisors is an integer number (10904400).

Almost surely, 2^90532557 is an apocalyptic number.

It is an amenable number.

90532557 is a deficient number, since it is larger than the sum of its proper divisors (40320243).

90532557 is a wasteful number, since it uses less digits than its factorization.

90532557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6432 (or 6429 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 36.

The square root of 90532557 is about 9514.8597992824. The cubic root of 90532557 is about 449.0226640875.

The spelling of 90532557 in words is "ninety million, five hundred thirty-two thousand, five hundred fifty-seven".