56178461 has 4 divisors (see below), whose sum is σ = 56193852. Its totient is φ = 56163072.

The previous prime is 56178449. The next prime is 56178547. The reversal of 56178461 is 16487165.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16487165 = 5 ⋅3297433.

It can be written as a sum of positive squares in 2 ways, for example, as 11689561 + 44488900 = 3419^2 + 6670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56178461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56178061) 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, 1235 + ... + 10671.

It is an arithmetic number, because the mean of its divisors is an integer number (14048463).

Almost surely, 2^56178461 is an apocalyptic number.

It is an amenable number.

56178461 is a deficient number, since it is larger than the sum of its proper divisors (15391).

56178461 is an equidigital number, since it uses as much as digits as its factorization.

56178461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15390.

The product of its digits is 40320, while the sum is 38.

The square root of 56178461 is about 7495.2292159747. The cubic root of 56178461 is about 382.9922146636.

The spelling of 56178461 in words is "fifty-six million, one hundred seventy-eight thousand, four hundred sixty-one".