56019561 has 16 divisors (see below), whose sum is σ = 83213760. Its totient is φ = 33284160.

The previous prime is 56019541. The next prime is 56019563. The reversal of 56019561 is 16591065.

It is not a de Polignac number, because 56019561 - 2¹³ = 56011369 is a prime.

It is a super-3 number, since 3×56019561³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (56019563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23635 + ... + 25896.

It is an arithmetic number, because the mean of its divisors is an integer number (5200860).

Almost surely, 2^56019561 is an apocalyptic number.

It is an amenable number.

56019561 is a deficient number, since it is larger than the sum of its proper divisors (27194199).

56019561 is a wasteful number, since it uses less digits than its factorization.

56019561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49576.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 56019561 is about 7484.6216337234. The cubic root of 56019561 is about 382.6307776150.

The spelling of 56019561 in words is "fifty-six million, nineteen thousand, five hundred sixty-one".