56578019 has 2 divisors, whose sum is σ = 56578020. Its totient is φ = 56578018.

The previous prime is 56578009. The next prime is 56578021. The reversal of 56578019 is 91087565.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56578019 is a prime.

It is a super-3 number, since 3×56578019³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 56578021, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56578009) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28289009 + 28289010.

It is an arithmetic number, because the mean of its divisors is an integer number (28289010).

Almost surely, 2^56578019 is an apocalyptic number.

56578019 is a deficient number, since it is larger than the sum of its proper divisors (1).

56578019 is an equidigital number, since it uses as much as digits as its factorization.

56578019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 56578019 is about 7521.8361455166. The cubic root of 56578019 is about 383.8980555300.

The spelling of 56578019 in words is "fifty-six million, five hundred seventy-eight thousand, nineteen".