56581019 has 4 divisors (see below), whose sum is σ = 61724760. Its totient is φ = 51437280.

The previous prime is 56580967. The next prime is 56581027. The reversal of 56581019 is 91018565.

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

It is a cyclic number.

It is not a de Polignac number, because 56581019 - 2¹⁶ = 56515483 is a prime.

It is a super-2 number, since 2×56581019² = 6402823422156722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56581019.

It is not an unprimeable number, because it can be changed into a prime (56581079) 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, 2571854 + ... + 2571875.

It is an arithmetic number, because the mean of its divisors is an integer number (15431190).

Almost surely, 2^56581019 is an apocalyptic number.

56581019 is a deficient number, since it is larger than the sum of its proper divisors (5143741).

56581019 is a wasteful number, since it uses less digits than its factorization.

56581019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5143740.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 56581019 is about 7522.0355622664. The cubic root of 56581019 is about 383.9048406964.

The spelling of 56581019 in words is "fifty-six million, five hundred eighty-one thousand, nineteen".