631223442 has 40 divisors (see below), whose sum is σ = 1444519296. Its totient is φ = 205928568.

The previous prime is 631223429. The next prime is 631223459. The reversal of 631223442 is 244322136.

631223442 is a `hidden beast` number, since 6 + 312 + 2 + 344 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33838 + ... + 49065.

Almost surely, 2^631223442 is an apocalyptic number.

631223442 is an abundant number, since it is smaller than the sum of its proper divisors (813295854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631223442 is a wasteful number, since it uses less digits than its factorization.

631223442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82964 (or 82955 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 631223442 is about 25124.1605232891. The cubic root of 631223442 is about 857.8164554328.

Adding to 631223442 its reverse (244322136), we get a palindrome (875545578).

It can be divided in two parts, 63122 and 3442, that added together give a square (66564 = 258²).

The spelling of 631223442 in words is "six hundred thirty-one million, two hundred twenty-three thousand, four hundred forty-two".