631571141 has 2 divisors, whose sum is σ = 631571142. Its totient is φ = 631571140.

The previous prime is 631571137. The next prime is 631571159. The reversal of 631571141 is 141175136.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 627753025 + 3818116 = 25055^2 + 1954^2 .

It is a cyclic number.

It is not a de Polignac number, because 631571141 - 2² = 631571137 is a prime.

It is a super-2 number, since 2×631571141² = 797764212288083762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631571041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315785570 + 315785571.

It is an arithmetic number, because the mean of its divisors is an integer number (315785571).

Almost surely, 2^631571141 is an apocalyptic number.

It is an amenable number.

631571141 is a deficient number, since it is larger than the sum of its proper divisors (1).

631571141 is an equidigital number, since it uses as much as digits as its factorization.

631571141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 631571141 is about 25131.0791849455. The cubic root of 631571141 is about 857.9739311941.

The spelling of 631571141 in words is "six hundred thirty-one million, five hundred seventy-one thousand, one hundred forty-one".