631942571 has 4 divisors (see below), whose sum is σ = 680553552. Its totient is φ = 583331592.

The previous prime is 631942561. The next prime is 631942607. The reversal of 631942571 is 175249136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631942571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631942561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24305471 + ... + 24305496.

It is an arithmetic number, because the mean of its divisors is an integer number (170138388).

Almost surely, 2^631942571 is an apocalyptic number.

631942571 is a deficient number, since it is larger than the sum of its proper divisors (48610981).

631942571 is a wasteful number, since it uses less digits than its factorization.

631942571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48610980.

The product of its digits is 45360, while the sum is 38.

The square root of 631942571 is about 25138.4679525225. The cubic root of 631942571 is about 858.1420910868.

The spelling of 631942571 in words is "six hundred thirty-one million, nine hundred forty-two thousand, five hundred seventy-one".