5631387571 has 2 divisors, whose sum is σ = 5631387572. Its totient is φ = 5631387570.

The previous prime is 5631387539. The next prime is 5631387623. The reversal of 5631387571 is 1757831365.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5631387571 - 2⁵ = 5631387539 is a prime.

It is not a weakly prime, because it can be changed into another prime (5631387871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2815693785 + 2815693786.

It is an arithmetic number, because the mean of its divisors is an integer number (2815693786).

Almost surely, 2^5631387571 is an apocalyptic number.

5631387571 is a deficient number, since it is larger than the sum of its proper divisors (1).

5631387571 is an equidigital number, since it uses as much as digits as its factorization.

5631387571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 46.

The square root of 5631387571 is about 75042.5717243219. The cubic root of 5631387571 is about 1779.1195800655.

The spelling of 5631387571 in words is "five billion, six hundred thirty-one million, three hundred eighty-seven thousand, five hundred seventy-one".