31396519855 has 16 divisors (see below), whose sum is σ = 38216116224. Its totient is φ = 24757200160.

The previous prime is 31396519841. The next prime is 31396519873. The reversal of 31396519855 is 55891569313.

It is not a de Polignac number, because 31396519855 - 2⁷ = 31396519727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31396519796 and 31396519805.

It is a congruent number.

It is an unprimeable number.

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, 1818594 + ... + 1835776.

It is an arithmetic number, because the mean of its divisors is an integer number (2388507264).

Almost surely, 2^31396519855 is an apocalyptic number.

31396519855 is a deficient number, since it is larger than the sum of its proper divisors (6819596369).

31396519855 is a wasteful number, since it uses less digits than its factorization.

31396519855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22406.

The product of its digits is 4374000, while the sum is 55.

The spelling of 31396519855 in words is "thirty-one billion, three hundred ninety-six million, five hundred nineteen thousand, eight hundred fifty-five".