31400104134431 has 4 divisors (see below), whose sum is σ = 31400711291664. Its totient is φ = 31399496977200.

The previous prime is 31400104134419. The next prime is 31400104134437. The reversal of 31400104134431 is 13443140100413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31400104134431 - 2²² = 31400099940127 is a prime.

It is a super-2 number, since 2×31400104134431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31400104134394 and 31400104134403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31400104134437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303501035 + ... + 303604476.

It is an arithmetic number, because the mean of its divisors is an integer number (7850177822916).

Almost surely, 2^{31400104134431} is an apocalyptic number.

31400104134431 is a deficient number, since it is larger than the sum of its proper divisors (607157233).

31400104134431 is an equidigital number, since it uses as much as digits as its factorization.

31400104134431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607157232.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 31400104134431 its reverse (13443140100413), we get a palindrome (44843244234844).

The spelling of 31400104134431 in words is "thirty-one trillion, four hundred billion, one hundred four million, one hundred thirty-four thousand, four hundred thirty-one".