56631143 has 2 divisors, whose sum is σ = 56631144. Its totient is φ = 56631142.

The previous prime is 56631139. The next prime is 56631163. The reversal of 56631143 is 34113665.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56631143 - 2² = 56631139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56631163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28315571 + 28315572.

It is an arithmetic number, because the mean of its divisors is an integer number (28315572).

Almost surely, 2^56631143 is an apocalyptic number.

56631143 is a deficient number, since it is larger than the sum of its proper divisors (1).

56631143 is an equidigital number, since it uses as much as digits as its factorization.

56631143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 56631143 is about 7525.3666355866. The cubic root of 56631143 is about 384.0181717927.

The spelling of 56631143 in words is "fifty-six million, six hundred thirty-one thousand, one hundred forty-three".