90054531 has 16 divisors (see below), whose sum is σ = 152473600. Its totient is φ = 51459624.

The previous prime is 90054527. The next prime is 90054539. The reversal of 90054531 is 13545009.

90054531 is a `hidden beast` number, since 90 + 0 + 545 + 31 = 666.

It is not a de Polignac number, because 90054531 - 2² = 90054527 is a prime.

It is a super-2 number, since 2×90054531² = 16219637107259922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90054495 and 90054504.

It is not an unprimeable number, because it can be changed into a prime (90054539) 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, 238051 + ... + 238428.

It is an arithmetic number, because the mean of its divisors is an integer number (9529600).

Almost surely, 2^90054531 is an apocalyptic number.

90054531 is a deficient number, since it is larger than the sum of its proper divisors (62419069).

90054531 is a wasteful number, since it uses less digits than its factorization.

90054531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476495 (or 476489 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 90054531 is about 9489.7065813438. The cubic root of 90054531 is about 448.2309658198.

The spelling of 90054531 in words is "ninety million, fifty-four thousand, five hundred thirty-one".