31720152452 has 24 divisors (see below), whose sum is σ = 59790746400. Its totient is φ = 14675907456.

The previous prime is 31720152419. The next prime is 31720152473. The reversal of 31720152452 is 25425102713.

It is a super-2 number, since 2×31720152452² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4849877 + ... + 4856412.

It is an arithmetic number, because the mean of its divisors is an integer number (2491281100).

Almost surely, 2^31720152452 is an apocalyptic number.

It is an amenable number.

31720152452 is a deficient number, since it is larger than the sum of its proper divisors (28070593948).

31720152452 is a wasteful number, since it uses less digits than its factorization.

31720152452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9706355 (or 9706353 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The spelling of 31720152452 in words is "thirty-one billion, seven hundred twenty million, one hundred fifty-two thousand, four hundred fifty-two".