56078581 has 8 divisors (see below), whose sum is σ = 61383224. Its totient is φ = 50915520.

The previous prime is 56078549. The next prime is 56078591. The reversal of 56078581 is 18587065.

It can be written as a sum of positive squares in 4 ways, for example, as 576081 + 55502500 = 759^2 + 7450^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 56078581 - 2⁵ = 56078549 is a prime.

It is a super-2 number, since 2×56078581² = 6289614493947122, 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 (56078521) 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, 34566 + ... + 36151.

It is an arithmetic number, because the mean of its divisors is an integer number (7672903).

Almost surely, 2^56078581 is an apocalyptic number.

It is an amenable number.

56078581 is a deficient number, since it is larger than the sum of its proper divisors (5304643).

56078581 is a wasteful number, since it uses less digits than its factorization.

56078581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70791.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 56078581 is about 7488.5633468643. The cubic root of 56078581 is about 382.7651053506.

The spelling of 56078581 in words is "fifty-six million, seventy-eight thousand, five hundred eighty-one".