9009531 has 12 divisors (see below), whose sum is σ = 13110552. Its totient is φ = 5961696.

The previous prime is 9009527. The next prime is 9009551. The reversal of 9009531 is 1359009.

It is not a de Polignac number, because 9009531 - 2² = 9009527 is a prime.

It is a super-2 number, since 2×9009531² = 162343297679922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9009495 and 9009504.

It is not an unprimeable number, because it can be changed into a prime (9009521) 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, 2421 + ... + 4886.

It is an arithmetic number, because the mean of its divisors is an integer number (1092546).

Almost surely, 2^9009531 is an apocalyptic number.

9009531 is a deficient number, since it is larger than the sum of its proper divisors (4101021).

9009531 is a wasteful number, since it uses less digits than its factorization.

9009531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450 (or 7447 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 27.

The square root of 9009531 is about 3001.5880796672. The cubic root of 9009531 is about 208.0817833597.

The spelling of 9009531 in words is "nine million, nine thousand, five hundred thirty-one".