31219540139 has 8 divisors (see below), whose sum is σ = 31292883312. Its totient is φ = 31146271200.

The previous prime is 31219540111. The next prime is 31219540141. The reversal of 31219540139 is 93104591213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31219540139 - 2¹² = 31219536043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31219540169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 873164 + ... + 908214.

It is an arithmetic number, because the mean of its divisors is an integer number (3911610414).

Almost surely, 2^31219540139 is an apocalyptic number.

31219540139 is a deficient number, since it is larger than the sum of its proper divisors (73343173).

31219540139 is a wasteful number, since it uses less digits than its factorization.

31219540139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37117.

The product of its (nonzero) digits is 29160, while the sum is 38.

The spelling of 31219540139 in words is "thirty-one billion, two hundred nineteen million, five hundred forty thousand, one hundred thirty-nine".