5315981 has 8 divisors (see below), whose sum is σ = 5886624. Its totient is φ = 4759920.

The previous prime is 5315977. The next prime is 5315987. The reversal of 5315981 is 1895135.

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

It is not a de Polignac number, because 5315981 - 2² = 5315977 is a prime.

It is a super-2 number, since 2×5315981² = 56519307984722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5315987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2870 + ... + 4343.

It is an arithmetic number, because the mean of its divisors is an integer number (735828).

Almost surely, 2^5315981 is an apocalyptic number.

It is an amenable number.

5315981 is a deficient number, since it is larger than the sum of its proper divisors (570643).

5315981 is a wasteful number, since it uses less digits than its factorization.

5315981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7291.

The product of its digits is 5400, while the sum is 32.

The square root of 5315981 is about 2305.6411255874. The cubic root of 5315981 is about 174.5264038338.

The spelling of 5315981 in words is "five million, three hundred fifteen thousand, nine hundred eighty-one".