56051869 has 4 divisors (see below), whose sum is σ = 56606940. Its totient is φ = 55496800.

The previous prime is 56051861. The next prime is 56051893. The reversal of 56051869 is 96815065.

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 33489369 + 22562500 = 5787^2 + 4750^2 .

It is a cyclic number.

It is not a de Polignac number, because 56051869 - 2³ = 56051861 is a prime.

It is a super-2 number, since 2×56051869² = 6283624036786322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56051861) 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, 277384 + ... + 277585.

It is an arithmetic number, because the mean of its divisors is an integer number (14151735).

Almost surely, 2^56051869 is an apocalyptic number.

It is an amenable number.

56051869 is a deficient number, since it is larger than the sum of its proper divisors (555071).

56051869 is a wasteful number, since it uses less digits than its factorization.

56051869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555070.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 56051869 is about 7486.7796147609. The cubic root of 56051869 is about 382.7043213272.

The spelling of 56051869 in words is "fifty-six million, fifty-one thousand, eight hundred sixty-nine".