31376681 has 8 divisors (see below), whose sum is σ = 37016064. Its totient is φ = 26026560.

The previous prime is 31376677. The next prime is 31376701. The reversal of 31376681 is 18667313.

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

It is not a de Polignac number, because 31376681 - 2² = 31376677 is a prime.

It is a super-2 number, since 2×31376681² = 1968992221151522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (31376281) 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, 72080 + ... + 72513.

It is an arithmetic number, because the mean of its divisors is an integer number (4627008).

Almost surely, 2^31376681 is an apocalyptic number.

31376681 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31376681 is a deficient number, since it is larger than the sum of its proper divisors (5639383).

31376681 is a wasteful number, since it uses less digits than its factorization.

31376681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144631.

The product of its digits is 18144, while the sum is 35.

The square root of 31376681 is about 5601.4891769957. The cubic root of 31376681 is about 315.4053101279.

The spelling of 31376681 in words is "thirty-one million, three hundred seventy-six thousand, six hundred eighty-one".