31262134621 has 4 divisors (see below), whose sum is σ = 31264001244. Its totient is φ = 31260268000.

The previous prime is 31262134613. The next prime is 31262134639. The reversal of 31262134621 is 12643126213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12643126213 = 43 ⋅294026191.

It can be written as a sum of positive squares in 2 ways, for example, as 31254350521 + 7784100 = 176789^2 + 2790^2 .

It is a cyclic number.

It is not a de Polignac number, because 31262134621 - 2³ = 31262134613 is a prime.

It is a super-2 number, since 2×31262134621² (a number of 22 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 (31262134661) 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, 907960 + ... + 941761.

It is an arithmetic number, because the mean of its divisors is an integer number (7816000311).

Almost surely, 2^31262134621 is an apocalyptic number.

It is an amenable number.

31262134621 is a deficient number, since it is larger than the sum of its proper divisors (1866623).

31262134621 is a wasteful number, since it uses less digits than its factorization.

31262134621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866622.

The product of its digits is 10368, while the sum is 31.

The spelling of 31262134621 in words is "thirty-one billion, two hundred sixty-two million, one hundred thirty-four thousand, six hundred twenty-one".