31915405009 has 8 divisors (see below), whose sum is σ = 32839544232. Its totient is φ = 31003190400.

The previous prime is 31915404967. The next prime is 31915405019. The reversal of 31915405009 is 90050451913.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24900840000 + 7014565009 = 157800^2 + 83753^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31915405009 - 2¹⁵ = 31915372241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31915405019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2975724 + ... + 2986429.

It is an arithmetic number, because the mean of its divisors is an integer number (4104943029).

Almost surely, 2^31915405009 is an apocalyptic number.

It is an amenable number.

31915405009 is a deficient number, since it is larger than the sum of its proper divisors (924139223).

31915405009 is a wasteful number, since it uses less digits than its factorization.

31915405009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5962307.

The product of its (nonzero) digits is 24300, while the sum is 37.

The spelling of 31915405009 in words is "thirty-one billion, nine hundred fifteen million, four hundred five thousand, nine".