56153819 has 4 divisors (see below), whose sum is σ = 56323800. Its totient is φ = 55983840.

The previous prime is 56153789. The next prime is 56153891. The reversal of 56153819 is 91835165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91835165 = 5 ⋅18367033.

It is a cyclic number.

It is not a de Polignac number, because 56153819 - 2⁸ = 56153563 is a prime.

It is a super-2 number, since 2×56153819² = 6306502776569522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56153519) 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, 84494 + ... + 85155.

It is an arithmetic number, because the mean of its divisors is an integer number (14080950).

Almost surely, 2^56153819 is an apocalyptic number.

56153819 is a deficient number, since it is larger than the sum of its proper divisors (169981).

56153819 is a wasteful number, since it uses less digits than its factorization.

56153819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169980.

The product of its digits is 32400, while the sum is 38.

The square root of 56153819 is about 7493.5851900142. The cubic root of 56153819 is about 382.9362081786.

The spelling of 56153819 in words is "fifty-six million, one hundred fifty-three thousand, eight hundred nineteen".