31412665370521 has 4 divisors (see below), whose sum is σ = 31412710347700. Its totient is φ = 31412620393344.

The previous prime is 31412665370519. The next prime is 31412665370587. The reversal of 31412665370521 is 12507356621413.

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 21118289375296 + 10294375995225 = 4595464^2 + 3208485^2 .

It is a cyclic number.

It is not a de Polignac number, because 31412665370521 - 2¹ = 31412665370519 is a prime.

It is a super-2 number, since 2×31412665370521² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31412665373521) 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, 21424176 + ... + 22843393.

It is an arithmetic number, because the mean of its divisors is an integer number (7853177586925).

Almost surely, 2^{31412665370521} is an apocalyptic number.

It is an amenable number.

31412665370521 is a deficient number, since it is larger than the sum of its proper divisors (44977179).

31412665370521 is an equidigital number, since it uses as much as digits as its factorization.

31412665370521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44977178.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 31412665370521 in words is "thirty-one trillion, four hundred twelve billion, six hundred sixty-five million, three hundred seventy thousand, five hundred twenty-one".