1531313880 has 64 divisors (see below), whose sum is σ = 4652121600. Its totient is φ = 403178880.

The previous prime is 1531313863. The next prime is 1531313887. The reversal of 1531313880 is 883131351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531313887) 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 15 ways as a sum of consecutive naturals, for example, 71286 + ... + 90245.

It is an arithmetic number, because the mean of its divisors is an integer number (72689400).

Almost surely, 2^1531313880 is an apocalyptic number.

1531313880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1531313880 is an abundant number, since it is smaller than the sum of its proper divisors (3120807720).

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

1531313880 is a wasteful number, since it uses less digits than its factorization.

1531313880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161624 (or 161620 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1531313880 is about 39132.0058264332. The cubic root of 1531313880 is about 1152.6251008010.

The spelling of 1531313880 in words is "one billion, five hundred thirty-one million, three hundred thirteen thousand, eight hundred eighty".