31347554681 has 8 divisors (see below), whose sum is σ = 33134349600. Its totient is φ = 29574452160.

The previous prime is 31347554629. The next prime is 31347554683. The reversal of 31347554681 is 18645574313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31347554681 is a prime.

It is a super-2 number, since 2×31347554681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31347554683) 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, 3418391 + ... + 3427548.

It is an arithmetic number, because the mean of its divisors is an integer number (4141793700).

Almost surely, 2^31347554681 is an apocalyptic number.

It is an amenable number.

31347554681 is a deficient number, since it is larger than the sum of its proper divisors (1786794919).

31347554681 is a wasteful number, since it uses less digits than its factorization.

31347554681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6846199.

The product of its digits is 1209600, while the sum is 47.

The spelling of 31347554681 in words is "thirty-one billion, three hundred forty-seven million, five hundred fifty-four thousand, six hundred eighty-one".