56402081 has 2 divisors, whose sum is σ = 56402082. Its totient is φ = 56402080.

The previous prime is 56402057. The next prime is 56402117. The reversal of 56402081 is 18020465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33744481 + 22657600 = 5809^2 + 4760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56402081 is a prime.

It is a super-2 number, since 2×56402081² = 6362389482261122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56402081.

It is not a weakly prime, because it can be changed into another prime (56402041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28201040 + 28201041.

It is an arithmetic number, because the mean of its divisors is an integer number (28201041).

Almost surely, 2^56402081 is an apocalyptic number.

It is an amenable number.

56402081 is a deficient number, since it is larger than the sum of its proper divisors (1).

56402081 is an equidigital number, since it uses as much as digits as its factorization.

56402081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 56402081 is about 7510.1318896541. The cubic root of 56402081 is about 383.4997124427.

The spelling of 56402081 in words is "fifty-six million, four hundred two thousand, eighty-one".