31320513545 has 8 divisors (see below), whose sum is σ = 37589541696. Its totient is φ = 25053127216.

The previous prime is 31320513467. The next prime is 31320513547. The reversal of 31320513545 is 54531502313.

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 31320513545 - 2¹² = 31320509449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31320513547) 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, 368087 + ... + 445116.

It is an arithmetic number, because the mean of its divisors is an integer number (4698692712).

Almost surely, 2^31320513545 is an apocalyptic number.

It is an amenable number.

31320513545 is a deficient number, since it is larger than the sum of its proper divisors (6269028151).

31320513545 is an equidigital number, since it uses as much as digits as its factorization.

31320513545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820911.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 31320513545 in words is "thirty-one billion, three hundred twenty million, five hundred thirteen thousand, five hundred forty-five".