31523338140 has 192 divisors, whose sum is σ = 109846195200. Its totient is φ = 6590674944.

The previous prime is 31523338117. The next prime is 31523338199. The reversal of 31523338140 is 4183332513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 163312 + ... + 299528.

It is an arithmetic number, because the mean of its divisors is an integer number (572115600).

Almost surely, 2^31523338140 is an apocalyptic number.

31523338140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31523338140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54923097600).

31523338140 is an abundant number, since it is smaller than the sum of its proper divisors (78322857060).

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

31523338140 is a wasteful number, since it uses less digits than its factorization.

31523338140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136284 (or 136282 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 31523338140 in words is "thirty-one billion, five hundred twenty-three million, three hundred thirty-eight thousand, one hundred forty".