251242535332 has 6 divisors (see below), whose sum is σ = 439674436838. Its totient is φ = 125621267664.

The previous prime is 251242535317. The next prime is 251242535333. The reversal of 251242535332 is 233535242152.

It can be written as a sum of positive squares in only one way, i.e., 230855264676 + 20387270656 = 480474^2 + 142784^2 .

It is a junction number, because it is equal to n+sod(n) for n = 251242535291 and 251242535300.

It is not an unprimeable number, because it can be changed into a prime (251242535333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31405316913 + ... + 31405316920.

Almost surely, 2^251242535332 is an apocalyptic number.

It is an amenable number.

251242535332 is a deficient number, since it is larger than the sum of its proper divisors (188431901506).

251242535332 is a wasteful number, since it uses less digits than its factorization.

251242535332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62810633837 (or 62810633835 counting only the distinct ones).

The product of its digits is 216000, while the sum is 37.

Adding to 251242535332 its reverse (233535242152), we get a palindrome (484777777484).

The spelling of 251242535332 in words is "two hundred fifty-one billion, two hundred forty-two million, five hundred thirty-five thousand, three hundred thirty-two".