31356103514431 has 16 divisors (see below), whose sum is σ = 31540853952000. Its totient is φ = 31171636188000.

The previous prime is 31356103514399. The next prime is 31356103514441. The reversal of 31356103514431 is 13441530165313.

It is a cyclic number.

It is not a de Polignac number, because 31356103514431 - 2⁵ = 31356103514399 is a prime.

It is a super-2 number, since 2×31356103514431² (a number of 28 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 (31356103514441) 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 15 ways as a sum of consecutive naturals, for example, 1370986926 + ... + 1371009796.

It is an arithmetic number, because the mean of its divisors is an integer number (1971303372000).

Almost surely, 2^{31356103514431} is an apocalyptic number.

31356103514431 is a deficient number, since it is larger than the sum of its proper divisors (184750437569).

31356103514431 is a wasteful number, since it uses less digits than its factorization.

31356103514431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28710.

The product of its (nonzero) digits is 194400, while the sum is 40.

Adding to 31356103514431 its reverse (13441530165313), we get a palindrome (44797633679744).

The spelling of 31356103514431 in words is "thirty-one trillion, three hundred fifty-six billion, one hundred three million, five hundred fourteen thousand, four hundred thirty-one".