56085981 has 8 divisors (see below), whose sum is σ = 85464384. Its totient is φ = 32049120.

The previous prime is 56085977. The next prime is 56086013. The reversal of 56085981 is 18958065.

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

It is not a de Polignac number, because 56085981 - 2² = 56085977 is a prime.

It is a super-2 number, since 2×56085981² = 6291274529464722, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56086981) 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, 1335360 + ... + 1335401.

It is an arithmetic number, because the mean of its divisors is an integer number (10683048).

Almost surely, 2^56085981 is an apocalyptic number.

It is an amenable number.

56085981 is a deficient number, since it is larger than the sum of its proper divisors (29378403).

56085981 is a wasteful number, since it uses less digits than its factorization.

56085981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670771.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 56085981 is about 7489.0574173256. The cubic root of 56085981 is about 382.7819408764.

The spelling of 56085981 in words is "fifty-six million, eighty-five thousand, nine hundred eighty-one".