90000000531 has 16 divisors (see below), whose sum is σ = 152380953600. Its totient is φ = 51428571624.

The previous prime is 90000000457. The next prime is 90000000547. The reversal of 90000000531 is 13500000009.

It is not a de Polignac number, because 90000000531 - 2⁹ = 90000000019 is a prime.

It is a super-2 number, since 2×90000000531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90000000581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238095051 + ... + 238095428.

It is an arithmetic number, because the mean of its divisors is an integer number (9523809600).

Almost surely, 2^90000000531 is an apocalyptic number.

90000000531 is a deficient number, since it is larger than the sum of its proper divisors (62380953069).

90000000531 is a wasteful number, since it uses less digits than its factorization.

90000000531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476190495 (or 476190489 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The spelling of 90000000531 in words is "ninety billion, five hundred thirty-one", and thus it is an aban number.