31380875647 has 8 divisors (see below), whose sum is σ = 34299396432. Its totient is φ = 28473307200.

The previous prime is 31380875633. The next prime is 31380875681. The reversal of 31380875647 is 74657808313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31380875647 - 2²⁷ = 31246657919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31380875594 and 31380875603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31380845647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2732088 + ... + 2743549.

It is an arithmetic number, because the mean of its divisors is an integer number (4287424554).

Almost surely, 2^31380875647 is an apocalyptic number.

31380875647 is a deficient number, since it is larger than the sum of its proper divisors (2918520785).

31380875647 is a wasteful number, since it uses less digits than its factorization.

31380875647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5476169.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 31380875647 in words is "thirty-one billion, three hundred eighty million, eight hundred seventy-five thousand, six hundred forty-seven".