31404545501513 has 4 divisors (see below), whose sum is σ = 31404559093908. Its totient is φ = 31404531909120.

The previous prime is 31404545501489. The next prime is 31404545501521. The reversal of 31404545501513 is 31510554540413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10600702480384 + 20803843021129 = 3255872^2 + 4561123^2 .

It is a cyclic number.

It is not a de Polignac number, because 31404545501513 - 2⁶ = 31404545501449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31404545501533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2369348 + ... + 8271813.

It is an arithmetic number, because the mean of its divisors is an integer number (7851139773477).

Almost surely, 2^{31404545501513} is an apocalyptic number.

It is an amenable number.

31404545501513 is a deficient number, since it is larger than the sum of its proper divisors (13592395).

31404545501513 is a wasteful number, since it uses less digits than its factorization.

31404545501513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13592394.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 31404545501513 in words is "thirty-one trillion, four hundred four billion, five hundred forty-five million, five hundred one thousand, five hundred thirteen".