31125044242 has 8 divisors (see below), whose sum is σ = 46853715132. Its totient is φ = 15507139200.

The previous prime is 31125044231. The next prime is 31125044287. The reversal of 31125044242 is 24244052113.

It can be written as a sum of positive squares in 2 ways, for example, as 27499920561 + 3625123681 = 165831^2 + 60209^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 31125044242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27690759 + ... + 27691882.

Almost surely, 2^31125044242 is an apocalyptic number.

31125044242 is a deficient number, since it is larger than the sum of its proper divisors (15728670890).

31125044242 is a wasteful number, since it uses less digits than its factorization.

31125044242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55382924.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 31125044242 its reverse (24244052113), we get a palindrome (55369096355).

The spelling of 31125044242 in words is "thirty-one billion, one hundred twenty-five million, forty-four thousand, two hundred forty-two".