31203400403131 has 4 divisors (see below), whose sum is σ = 34040073167064. Its totient is φ = 28366727639200.

The previous prime is 31203400403099. The next prime is 31203400403141. The reversal of 31203400403131 is 13130400430213.

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 31203400403131 - 2⁵ = 31203400403099 is a prime.

It is a super-2 number, since 2×31203400403131² (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 = 31203400403096 and 31203400403105.

It is not an unprimeable number, because it can be changed into a prime (31203400403141) 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, 1418336381950 + ... + 1418336381971.

It is an arithmetic number, because the mean of its divisors is an integer number (8510018291766).

Almost surely, 2^{31203400403131} is an apocalyptic number.

31203400403131 is a deficient number, since it is larger than the sum of its proper divisors (2836672763933).

31203400403131 is a wasteful number, since it uses less digits than its factorization.

31203400403131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836672763932.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31203400403131 its reverse (13130400430213), we get a palindrome (44333800833344).

The spelling of 31203400403131 in words is "thirty-one trillion, two hundred three billion, four hundred million, four hundred three thousand, one hundred thirty-one".