31291323348 has 12 divisors (see below), whose sum is σ = 73013087840. Its totient is φ = 10430441112.

The previous prime is 31291323347. The next prime is 31291323389. The reversal of 31291323348 is 84332319213.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31291323347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1303805128 + ... + 1303805151.

Almost surely, 2^31291323348 is an apocalyptic number.

It is an amenable number.

31291323348 is an abundant number, since it is smaller than the sum of its proper divisors (41721764492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31291323348 is a wasteful number, since it uses less digits than its factorization.

31291323348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607610286 (or 2607610284 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The spelling of 31291323348 in words is "thirty-one billion, two hundred ninety-one million, three hundred twenty-three thousand, three hundred forty-eight".