56155919 has 8 divisors (see below), whose sum is σ = 58694160. Its totient is φ = 53657856.

The previous prime is 56155873. The next prime is 56155943. The reversal of 56155919 is 91955165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56155919 - 2²⁰ = 55107343 is a prime.

It is a super-2 number, since 2×56155919² = 6306974477469122, 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 (56155969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7169 + ... + 12794.

It is an arithmetic number, because the mean of its divisors is an integer number (7336770).

Almost surely, 2^56155919 is an apocalyptic number.

56155919 is a deficient number, since it is larger than the sum of its proper divisors (2538241).

56155919 is a wasteful number, since it uses less digits than its factorization.

56155919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20089.

The product of its digits is 60750, while the sum is 41.

The square root of 56155919 is about 7493.7253085498. The cubic root of 56155919 is about 382.9409817097.

The spelling of 56155919 in words is "fifty-six million, one hundred fifty-five thousand, nine hundred nineteen".