56171963 has 2 divisors, whose sum is σ = 56171964. Its totient is φ = 56171962.

The previous prime is 56171939. The next prime is 56171981. The reversal of 56171963 is 36917165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56171963 - 2²² = 51977659 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56171933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28085981 + 28085982.

It is an arithmetic number, because the mean of its divisors is an integer number (28085982).

Almost surely, 2^56171963 is an apocalyptic number.

56171963 is a deficient number, since it is larger than the sum of its proper divisors (1).

56171963 is an equidigital number, since it uses as much as digits as its factorization.

56171963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 56171963 is about 7494.7957277033. The cubic root of 56171963 is about 382.9774475605.

The spelling of 56171963 in words is "fifty-six million, one hundred seventy-one thousand, nine hundred sixty-three".