31084361 has 16 divisors (see below), whose sum is σ = 40796160. Its totient is φ = 22945680.

The previous prime is 31084357. The next prime is 31084363. The reversal of 31084361 is 16348013.

It is a cyclic number.

It is not a de Polignac number, because 31084361 - 2² = 31084357 is a prime.

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 31084361.

It is not an unprimeable number, because it can be changed into a prime (31084363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9161 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (2549760).

Almost surely, 2^31084361 is an apocalyptic number.

It is an amenable number.

31084361 is a deficient number, since it is larger than the sum of its proper divisors (9711799).

31084361 is a wasteful number, since it uses less digits than its factorization.

31084361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21284.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 31084361 is about 5575.3350571961. The cubic root of 31084361 is about 314.4227641460.

The spelling of 31084361 in words is "thirty-one million, eighty-four thousand, three hundred sixty-one".