56161543 has 2 divisors, whose sum is σ = 56161544. Its totient is φ = 56161542.

The previous prime is 56161537. The next prime is 56161577. The reversal of 56161543 is 34516165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56161543 - 2⁹ = 56161031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56161583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28080771 + 28080772.

It is an arithmetic number, because the mean of its divisors is an integer number (28080772).

Almost surely, 2^56161543 is an apocalyptic number.

56161543 is a deficient number, since it is larger than the sum of its proper divisors (1).

56161543 is an equidigital number, since it uses as much as digits as its factorization.

56161543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 56161543 is about 7494.1005464298. The cubic root of 56161543 is about 382.9537650947.

The spelling of 56161543 in words is "fifty-six million, one hundred sixty-one thousand, five hundred forty-three".