31400104220031 has 16 divisors (see below), whose sum is σ = 42273785638656. Its totient is φ = 20729917674816.

The previous prime is 31400104220027. The next prime is 31400104220077. The reversal of 31400104220031 is 13002240100413.

It is not a de Polignac number, because 31400104220031 - 2² = 31400104220027 is a prime.

It is a super-2 number, since 2×31400104220031² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31400104220081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27309451 + ... + 28436003.

It is an arithmetic number, because the mean of its divisors is an integer number (2642111602416).

Almost surely, 2^{31400104220031} is an apocalyptic number.

31400104220031 is a deficient number, since it is larger than the sum of its proper divisors (10873681418625).

31400104220031 is a wasteful number, since it uses less digits than its factorization.

31400104220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216862.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31400104220031 its reverse (13002240100413), we get a palindrome (44402344320444).

The spelling of 31400104220031 in words is "thirty-one trillion, four hundred billion, one hundred four million, two hundred twenty thousand, thirty-one".