31140312145 has 16 divisors (see below), whose sum is σ = 39226602240. Its totient is φ = 23686404544.

The previous prime is 31140312103. The next prime is 31140312167. The reversal of 31140312145 is 54121304113.

It is a cyclic number.

It is not a de Polignac number, because 31140312145 - 2²⁵ = 31106757713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 791530 + ... + 829939.

It is an arithmetic number, because the mean of its divisors is an integer number (2451662640).

Almost surely, 2^31140312145 is an apocalyptic number.

It is an amenable number.

31140312145 is a deficient number, since it is larger than the sum of its proper divisors (8086290095).

31140312145 is a wasteful number, since it uses less digits than its factorization.

31140312145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621664.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 31140312145 its reverse (54121304113), we get a palindrome (85261616258).

The spelling of 31140312145 in words is "thirty-one billion, one hundred forty million, three hundred twelve thousand, one hundred forty-five".