56191801 has 4 divisors (see below), whose sum is σ = 56425204. Its totient is φ = 55958400.

The previous prime is 56191787. The next prime is 56191813. The reversal of 56191801 is 10819165.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28355625 + 27836176 = 5325^2 + 5276^2 .

It is a cyclic number.

It is not a de Polignac number, because 56191801 - 2⁵ = 56191769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56191301) 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, 116340 + ... + 116821.

It is an arithmetic number, because the mean of its divisors is an integer number (14106301).

Almost surely, 2^56191801 is an apocalyptic number.

It is an amenable number.

56191801 is a deficient number, since it is larger than the sum of its proper divisors (233403).

56191801 is a wasteful number, since it uses less digits than its factorization.

56191801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233402.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 56191801 is about 7496.1190625550. The cubic root of 56191801 is about 383.0225270627.

The spelling of 56191801 in words is "fifty-six million, one hundred ninety-one thousand, eight hundred one".