31252240016 has 20 divisors (see below), whose sum is σ = 60766708524. Its totient is φ = 15570508800.

The previous prime is 31252240009. The next prime is 31252240031. The reversal of 31252240016 is 61004225213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25805209600 + 5447030416 = 160640^2 + 73804^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3471065 + ... + 3480056.

Almost surely, 2^31252240016 is an apocalyptic number.

It is an amenable number.

31252240016 is a deficient number, since it is larger than the sum of its proper divisors (29514468508).

31252240016 is a wasteful number, since it uses less digits than its factorization.

31252240016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6951410 (or 6951404 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 31252240016 its reverse (61004225213), we get a palindrome (92256465229).

The spelling of 31252240016 in words is "thirty-one billion, two hundred fifty-two million, two hundred forty thousand, sixteen".