31381068 has 12 divisors (see below), whose sum is σ = 73222520. Its totient is φ = 10460352.

The previous prime is 31381061. The next prime is 31381073. The reversal of 31381068 is 86018313.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (31381061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1307533 + ... + 1307556.

Almost surely, 2^31381068 is an apocalyptic number.

It is an amenable number.

31381068 is an abundant number, since it is smaller than the sum of its proper divisors (41841452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31381068 is a wasteful number, since it uses less digits than its factorization.

31381068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615096 (or 2615094 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 31381068 is about 5601.8807556034. The cubic root of 31381068 is about 315.4200091397.

The spelling of 31381068 in words is "thirty-one million, three hundred eighty-one thousand, sixty-eight".