631402461 has 12 divisors (see below), whose sum is σ = 913234140. Its totient is φ = 420377280.

The previous prime is 631402427. The next prime is 631402469. The reversal of 631402461 is 164204136.

631402461 is a `hidden beast` number, since 63 + 140 + 2 + 461 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 114704100 + 516698361 = 10710^2 + 22731^2 .

It is not a de Polignac number, because 631402461 - 2⁶ = 631402397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631402469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39246 + ... + 52943.

It is an arithmetic number, because the mean of its divisors is an integer number (76102845).

Almost surely, 2^631402461 is an apocalyptic number.

It is an amenable number.

631402461 is a deficient number, since it is larger than the sum of its proper divisors (281831679).

631402461 is a wasteful number, since it uses less digits than its factorization.

631402461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92956 (or 92953 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 631402461 is about 25127.7229569255. The cubic root of 631402461 is about 857.8975418431.

Adding to 631402461 its reverse (164204136), we get a palindrome (795606597).

The spelling of 631402461 in words is "six hundred thirty-one million, four hundred two thousand, four hundred sixty-one".