31431055113542 has 32 divisors (see below), whose sum is σ = 55007120347200. Its totient is φ = 13464159898560.

The previous prime is 31431055113541. The next prime is 31431055113587. The reversal of 31431055113542 is 24531155013413.

It is a super-2 number, since 2×31431055113542² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31431055113496 and 31431055113505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431055113541) 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, 9231383 + ... + 12168834.

It is an arithmetic number, because the mean of its divisors is an integer number (1718972510850).

Almost surely, 2^{31431055113542} is an apocalyptic number.

31431055113542 is a deficient number, since it is larger than the sum of its proper divisors (23576065233658).

31431055113542 is a wasteful number, since it uses less digits than its factorization.

31431055113542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21402381 (or 21402367 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 31431055113542 in words is "thirty-one trillion, four hundred thirty-one billion, fifty-five million, one hundred thirteen thousand, five hundred forty-two".