631156242 has 8 divisors (see below), whose sum is σ = 1262312496. Its totient is φ = 210385412.

The previous prime is 631156223. The next prime is 631156243. The reversal of 631156242 is 242651136.

631156242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

631156242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (631156243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52596348 + ... + 52596359.

It is an arithmetic number, because the mean of its divisors is an integer number (157789062).

Almost surely, 2^631156242 is an apocalyptic number.

631156242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

631156242 is a wasteful number, since it uses less digits than its factorization.

631156242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105192712.

The product of its digits is 8640, while the sum is 30.

The square root of 631156242 is about 25122.8231295768. The cubic root of 631156242 is about 857.7860133275.

The spelling of 631156242 in words is "six hundred thirty-one million, one hundred fifty-six thousand, two hundred forty-two".