56178911 has 4 divisors (see below), whose sum is σ = 56345952. Its totient is φ = 56011872.

The previous prime is 56178907. The next prime is 56178919. The reversal of 56178911 is 11987165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56178911 - 2² = 56178907 is a prime.

It is a super-2 number, since 2×56178911² = 6312140082291842, 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 (56178919) 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, 83015 + ... + 83688.

It is an arithmetic number, because the mean of its divisors is an integer number (14086488).

Almost surely, 2^56178911 is an apocalyptic number.

56178911 is a deficient number, since it is larger than the sum of its proper divisors (167041).

56178911 is a wasteful number, since it uses less digits than its factorization.

56178911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167040.

The product of its digits is 15120, while the sum is 38.

The square root of 56178911 is about 7495.2592350098. The cubic root of 56178911 is about 382.9932372740.

The spelling of 56178911 in words is "fifty-six million, one hundred seventy-eight thousand, nine hundred eleven".