631322452 has 6 divisors (see below), whose sum is σ = 1104814298. Its totient is φ = 315661224.

The previous prime is 631322429. The next prime is 631322459. The reversal of 631322452 is 254223136.

It can be written as a sum of positive squares in only one way, i.e., 338707216 + 292615236 = 18404^2 + 17106^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 631322452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631322459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78915303 + ... + 78915310.

Almost surely, 2^631322452 is an apocalyptic number.

It is an amenable number.

631322452 is a deficient number, since it is larger than the sum of its proper divisors (473491846).

631322452 is a wasteful number, since it uses less digits than its factorization.

631322452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157830617 (or 157830615 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 631322452 is about 25126.1308601225. The cubic root of 631322452 is about 857.8613037709.

Adding to 631322452 its reverse (254223136), we get a palindrome (885545588).

The spelling of 631322452 in words is "six hundred thirty-one million, three hundred twenty-two thousand, four hundred fifty-two".