31351401213408 has 120 divisors (see below), whose sum is σ = 92217543058872. Its totient is φ = 10448886760704.

The previous prime is 31351401213383. The next prime is 31351401213437. The reversal of 31351401213408 is 80431210415313.

31351401213408 is a `hidden beast` number, since 3 + 1 + 3 + 514 + 0 + 1 + 2 + 134 + 0 + 8 = 666.

It is a super-2 number, since 2×31351401213408² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16291891 + ... + 18114317.

Almost surely, 2^{31351401213408} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31351401213408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46108771529436).

31351401213408 is an abundant number, since it is smaller than the sum of its proper divisors (60866141845464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31351401213408 is a wasteful number, since it uses less digits than its factorization.

31351401213408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829086 (or 1829069 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 31351401213408 in words is "thirty-one trillion, three hundred fifty-one billion, four hundred one million, two hundred thirteen thousand, four hundred eight".