56491019 has 4 divisors (see below), whose sum is σ = 60836496. Its totient is φ = 52145544.

The previous prime is 56491007. The next prime is 56491031. The reversal of 56491019 is 91019465.

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

It is an interprime number because it is at equal distance from previous prime (56491007) and next prime (56491031).

It is a cyclic number.

It is not a de Polignac number, because 56491019 - 2⁴ = 56491003 is a prime.

It is a super-2 number, since 2×56491019² = 6382470455316722, 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 56491019.

It is not an unprimeable number, because it can be changed into a prime (56491049) 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, 2172719 + ... + 2172744.

It is an arithmetic number, because the mean of its divisors is an integer number (15209124).

Almost surely, 2^56491019 is an apocalyptic number.

56491019 is a deficient number, since it is larger than the sum of its proper divisors (4345477).

56491019 is a wasteful number, since it uses less digits than its factorization.

56491019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4345476.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 56491019 is about 7516.0507582107. The cubic root of 56491019 is about 383.7011812825.

The spelling of 56491019 in words is "fifty-six million, four hundred ninety-one thousand, nineteen".