31312224045 has 24 divisors (see below), whose sum is σ = 54407254200. Its totient is φ = 16659012096.

The previous prime is 31312224017. The next prime is 31312224049. The reversal of 31312224045 is 54042221313.

31312224045 is a `hidden beast` number, since 3 + 1 + 31 + 222 + 404 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1420234596 + 29891989449 = 37686^2 + 172893^2 .

It is not a de Polignac number, because 31312224045 - 2⁶ = 31312223981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312224049) 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, 832240 + ... + 869049.

It is an arithmetic number, because the mean of its divisors is an integer number (2266968925).

Almost surely, 2^31312224045 is an apocalyptic number.

It is an amenable number.

31312224045 is a deficient number, since it is larger than the sum of its proper divisors (23095030155).

31312224045 is a wasteful number, since it uses less digits than its factorization.

31312224045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701709 (or 1701706 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 31312224045 its reverse (54042221313), we get a palindrome (85354445358).

The spelling of 31312224045 in words is "thirty-one billion, three hundred twelve million, two hundred twenty-four thousand, forty-five".