56440819 has 2 divisors, whose sum is σ = 56440820. Its totient is φ = 56440818.

The previous prime is 56440793. The next prime is 56440829. The reversal of 56440819 is 91804465.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56440819 - 2¹³ = 56432627 is a prime.

It is a super-2 number, since 2×56440819² = 6371132098781522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56440829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28220409 + 28220410.

It is an arithmetic number, because the mean of its divisors is an integer number (28220410).

Almost surely, 2^56440819 is an apocalyptic number.

56440819 is a deficient number, since it is larger than the sum of its proper divisors (1).

56440819 is an equidigital number, since it uses as much as digits as its factorization.

56440819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 56440819 is about 7512.7104962191. The cubic root of 56440819 is about 383.5874905989.

The spelling of 56440819 in words is "fifty-six million, four hundred forty thousand, eight hundred nineteen".