31377391019 has 8 divisors (see below), whose sum is σ = 33792581760. Its totient is φ = 28962421056.

The previous prime is 31377390991. The next prime is 31377391063. The reversal of 31377391019 is 91019377313.

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 31377391019 - 2³² = 27082423723 is a prime.

It is a super-2 number, since 2×31377391019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31377391099) 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 7 ways as a sum of consecutive naturals, for example, 350447 + ... + 430775.

It is an arithmetic number, because the mean of its divisors is an integer number (4224072720).

Almost surely, 2^31377391019 is an apocalyptic number.

31377391019 is a deficient number, since it is larger than the sum of its proper divisors (2415190741).

31377391019 is a wasteful number, since it uses less digits than its factorization.

31377391019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110389.

The product of its (nonzero) digits is 107163, while the sum is 44.

The spelling of 31377391019 in words is "thirty-one billion, three hundred seventy-seven million, three hundred ninety-one thousand, nineteen".