31815380149 has 16 divisors (see below), whose sum is σ = 37424350720. Its totient is φ = 26483708160.

The previous prime is 31815380141. The next prime is 31815380159. The reversal of 31815380149 is 94108351813.

It is not a de Polignac number, because 31815380149 - 2³ = 31815380141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31815380141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437844 + ... + 505309.

It is an arithmetic number, because the mean of its divisors is an integer number (2339021920).

Almost surely, 2^31815380149 is an apocalyptic number.

It is an amenable number.

31815380149 is a deficient number, since it is larger than the sum of its proper divisors (5608970571).

31815380149 is an equidigital number, since it uses as much as digits as its factorization.

31815380149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943300.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 31815380149 in words is "thirty-one billion, eight hundred fifteen million, three hundred eighty thousand, one hundred forty-nine".