31240746005 has 12 divisors (see below), whose sum is σ = 43609531500. Its totient is φ = 21422225664.

The previous prime is 31240746001. The next prime is 31240746037. The reversal of 31240746005 is 50064704213.

It can be written as a sum of positive squares in 2 ways, for example, as 10780876561 + 20459869444 = 103831^2 + 143038^2 .

It is not a de Polignac number, because 31240746005 - 2² = 31240746001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31240746001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63756380 + ... + 63756869.

It is an arithmetic number, because the mean of its divisors is an integer number (3634127625).

Almost surely, 2^31240746005 is an apocalyptic number.

31240746005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31240746005 is a deficient number, since it is larger than the sum of its proper divisors (12368785495).

31240746005 is a wasteful number, since it uses less digits than its factorization.

31240746005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127513268 (or 127513261 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 31240746005 in words is "thirty-one billion, two hundred forty million, seven hundred forty-six thousand, five".