31081470707072 has 64 divisors (see below), whose sum is σ = 65617618449600. Its totient is φ = 14638875955200.

The previous prime is 31081470707069. The next prime is 31081470707081. The reversal of 31081470707072 is 27070707418013.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101960504 + ... + 102264887.

It is an arithmetic number, because the mean of its divisors is an integer number (1025275288275).

Almost surely, 2^{31081470707072} is an apocalyptic number.

31081470707072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31081470707072 is an abundant number, since it is smaller than the sum of its proper divisors (34536147742528).

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

31081470707072 is a wasteful number, since it uses less digits than its factorization.

31081470707072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204225475 (or 204225463 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 47.

The spelling of 31081470707072 in words is "thirty-one trillion, eighty-one billion, four hundred seventy million, seven hundred seven thousand, seventy-two".