637312242 has 32 divisors (see below), whose sum is σ = 1458000000. Its totient is φ = 181928448.

The previous prime is 637312219. The next prime is 637312243. The reversal of 637312242 is 242213736.

It is not an unprimeable number, because it can be changed into a prime (637312243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46384 + ... + 58532.

It is an arithmetic number, because the mean of its divisors is an integer number (45562500).

Almost surely, 2^637312242 is an apocalyptic number.

637312242 is an abundant number, since it is smaller than the sum of its proper divisors (820687758).

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

637312242 is a wasteful number, since it uses less digits than its factorization.

637312242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13410.

The product of its digits is 12096, while the sum is 30.

The square root of 637312242 is about 25245.0439096469. The cubic root of 637312242 is about 860.5658084819.

Adding to 637312242 its reverse (242213736), we get a palindrome (879525978).

The spelling of 637312242 in words is "six hundred thirty-seven million, three hundred twelve thousand, two hundred forty-two".