31301132009 has 24 divisors (see below), whose sum is σ = 37618500480. Its totient is φ = 25464890880.

The previous prime is 31301131997. The next prime is 31301132021. The reversal of 31301132009 is 90023110313.

It is an interprime number because it is at equal distance from previous prime (31301131997) and next prime (31301132021).

It is not a de Polignac number, because 31301132009 - 2²⁸ = 31032696553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31301137009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2757257 + ... + 2768585.

It is an arithmetic number, because the mean of its divisors is an integer number (1567437520).

Almost surely, 2^31301132009 is an apocalyptic number.

It is an amenable number.

31301132009 is a deficient number, since it is larger than the sum of its proper divisors (6317368471).

31301132009 is a wasteful number, since it uses less digits than its factorization.

31301132009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11621 (or 11490 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 23.

The spelling of 31301132009 in words is "thirty-one billion, three hundred one million, one hundred thirty-two thousand, nine".