251042612 has 6 divisors (see below), whose sum is σ = 439324578. Its totient is φ = 125521304.

The previous prime is 251042599. The next prime is 251042629. The reversal of 251042612 is 216240152.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 230918416 + 20124196 = 15196^2 + 4486^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 31380323 + ... + 31380330.

It is an arithmetic number, because the mean of its divisors is an integer number (73220763).

Almost surely, 2^251042612 is an apocalyptic number.

It is an amenable number.

251042612 is a deficient number, since it is larger than the sum of its proper divisors (188281966).

251042612 is a wasteful number, since it uses less digits than its factorization.

251042612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62760657 (or 62760655 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 251042612 is about 15844.3242834777. The cubic root of 251042612 is about 630.8350495558.

Adding to 251042612 its reverse (216240152), we get a palindrome (467282764).

The spelling of 251042612 in words is "two hundred fifty-one million, forty-two thousand, six hundred twelve".