251651012 has 12 divisors (see below), whose sum is σ = 441062160. Its totient is φ = 125633256.

The previous prime is 251650979. The next prime is 251651039. The reversal of 251651012 is 210156152.

It is a happy number.

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, 45098 + ... + 50369.

It is an arithmetic number, because the mean of its divisors is an integer number (36755180).

Almost surely, 2^251651012 is an apocalyptic number.

It is an amenable number.

251651012 is a deficient number, since it is larger than the sum of its proper divisors (189411148).

251651012 is a wasteful number, since it uses less digits than its factorization.

251651012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96130 (or 96128 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 251651012 is about 15863.5119692961. The cubic root of 251651012 is about 631.3442465301.

The spelling of 251651012 in words is "two hundred fifty-one million, six hundred fifty-one thousand, twelve".