31253443525320 has 128 divisors (see below), whose sum is σ = 98710739251200. Its totient is φ = 7894354431744.

The previous prime is 31253443525313. The next prime is 31253443525349. The reversal of 31253443525320 is 2352534435213.

It is a super-2 number, since 2×31253443525320² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13332489 + ... + 15500391.

It is an arithmetic number, because the mean of its divisors is an integer number (771177650400).

Almost surely, 2^{31253443525320} is an apocalyptic number.

31253443525320 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 31253443525320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49355369625600).

31253443525320 is an abundant number, since it is smaller than the sum of its proper divisors (67457295725880).

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

31253443525320 is a wasteful number, since it uses less digits than its factorization.

31253443525320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174259 (or 2174255 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 42.

The spelling of 31253443525320 in words is "thirty-one trillion, two hundred fifty-three billion, four hundred forty-three million, five hundred twenty-five thousand, three hundred twenty".