56021143 has 2 divisors, whose sum is σ = 56021144. Its totient is φ = 56021142.

The previous prime is 56021111. The next prime is 56021153. The reversal of 56021143 is 34112065.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56021143 - 2⁵ = 56021111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56021153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28010571 + 28010572.

It is an arithmetic number, because the mean of its divisors is an integer number (28010572).

Almost surely, 2^56021143 is an apocalyptic number.

56021143 is a deficient number, since it is larger than the sum of its proper divisors (1).

56021143 is an equidigital number, since it uses as much as digits as its factorization.

56021143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 56021143 is about 7484.7273163423. The cubic root of 56021143 is about 382.6343794295.

The spelling of 56021143 in words is "fifty-six million, twenty-one thousand, one hundred forty-three".