31382081 has 8 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 30835728.

The previous prime is 31382059. The next prime is 31382083. The reversal of 31382081 is 18028313.

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-31382081 is a prime.

It is a super-2 number, since 2×31382081² = 1969670015781122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31382081.

It is not an unprimeable number, because it can be changed into a prime (31382083) 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, 12710 + ... + 14976.

It is an arithmetic number, because the mean of its divisors is an integer number (3991680).

Almost surely, 2^31382081 is an apocalyptic number.

It is an amenable number.

31382081 is a deficient number, since it is larger than the sum of its proper divisors (551359).

31382081 is a wasteful number, since it uses less digits than its factorization.

31382081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 31382081 is about 5601.9711709362. The cubic root of 31382081 is about 315.4234030865.

The spelling of 31382081 in words is "thirty-one million, three hundred eighty-two thousand, eighty-one".