31219104387 has 16 divisors (see below), whose sum is σ = 41779584000. Its totient is φ = 20735817024.

The previous prime is 31219104377. The next prime is 31219104401. The reversal of 31219104387 is 78340191213.

It is not a de Polignac number, because 31219104387 - 2⁸ = 31219104131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31219104377) 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, 930439 + ... + 963407.

It is an arithmetic number, because the mean of its divisors is an integer number (2611224000).

Almost surely, 2^31219104387 is an apocalyptic number.

31219104387 is a deficient number, since it is larger than the sum of its proper divisors (10560479613).

31219104387 is a wasteful number, since it uses less digits than its factorization.

31219104387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34130.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 31219104387 in words is "thirty-one billion, two hundred nineteen million, one hundred four thousand, three hundred eighty-seven".