631043217 has 30 divisors (see below), whose sum is σ = 1096581618. Its totient is φ = 360593856.

The previous prime is 631043207. The next prime is 631043221. The reversal of 631043217 is 712340136.

631043217 is a `hidden beast` number, since 631 + 0 + 4 + 3 + 21 + 7 = 666.

631043217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 609892416 + 21150801 = 24696^2 + 4599^2 .

It is not a de Polignac number, because 631043217 - 2²² = 626848913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (631043207) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 75528 + ... + 83465.

Almost surely, 2^631043217 is an apocalyptic number.

It is an amenable number.

631043217 is a deficient number, since it is larger than the sum of its proper divisors (465538401).

631043217 is a wasteful number, since it uses less digits than its factorization.

631043217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159019 (or 159003 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 631043217 is about 25120.5735802350. The cubic root of 631043217 is about 857.7348072787.

The spelling of 631043217 in words is "six hundred thirty-one million, forty-three thousand, two hundred seventeen".