90215012031 has 16 divisors (see below), whose sum is σ = 121093440000. Its totient is φ = 59740975008.

The previous prime is 90215011951. The next prime is 90215012033. The reversal of 90215012031 is 13021051209.

It is not a de Polignac number, because 90215012031 - 2³¹ = 88067528383 is a prime.

It is a super-2 number, since 2×90215012031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90215011992 and 90215012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90215012033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231465 + ... + 483741.

It is an arithmetic number, because the mean of its divisors is an integer number (7568340000).

Almost surely, 2^90215012031 is an apocalyptic number.

90215012031 is a deficient number, since it is larger than the sum of its proper divisors (30878427969).

90215012031 is a wasteful number, since it uses less digits than its factorization.

90215012031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253078.

The product of its (nonzero) digits is 540, while the sum is 24.

The spelling of 90215012031 in words is "ninety billion, two hundred fifteen million, twelve thousand, thirty-one".