90214731 has 12 divisors (see below), whose sum is σ = 133341208. Its totient is φ = 58744224.

The previous prime is 90214727. The next prime is 90214739. The reversal of 90214731 is 13741209.

It is not a de Polignac number, because 90214731 - 2² = 90214727 is a prime.

It is a super-2 number, since 2×90214731² = 16277395378804722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90214695 and 90214704.

It is not an unprimeable number, because it can be changed into a prime (90214739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116170 + ... + 116943.

Almost surely, 2^90214731 is an apocalyptic number.

90214731 is a deficient number, since it is larger than the sum of its proper divisors (43126477).

90214731 is a wasteful number, since it uses less digits than its factorization.

90214731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233162 (or 233159 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 90214731 is about 9498.1435554533. The cubic root of 90214731 is about 448.4965977005.

The spelling of 90214731 in words is "ninety million, two hundred fourteen thousand, seven hundred thirty-one".