31386974503501 has 6 divisors (see below), whose sum is σ = 33341872569770. Its totient is φ = 29540681885376.

The previous prime is 31386974503463. The next prime is 31386974503517. The reversal of 31386974503501 is 10530547968313.

It can be written as a sum of positive squares in 3 ways, for example, as 19040001345225 + 12346973158276 = 4363485^2 + 3513826^2 .

It is not a de Polignac number, because 31386974503501 - 2¹¹ = 31386974501453 is a prime.

It is a super-2 number, since 2×31386974503501² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31386974503571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54302723766 + ... + 54302724343.

Almost surely, 2^{31386974503501} is an apocalyptic number.

It is an amenable number.

31386974503501 is a deficient number, since it is larger than the sum of its proper divisors (1954898066269).

31386974503501 is a wasteful number, since it uses less digits than its factorization.

31386974503501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108605448143 (or 108605448126 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 31386974503501 in words is "thirty-one trillion, three hundred eighty-six billion, nine hundred seventy-four million, five hundred three thousand, five hundred one".