251045216 has 24 divisors (see below), whose sum is σ = 494724384. Its totient is φ = 125400960.

The previous prime is 251045213. The next prime is 251045231. The reversal of 251045216 is 612540152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251045213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36206 + ... + 42578.

It is an arithmetic number, because the mean of its divisors is an integer number (20613516).

Almost surely, 2^251045216 is an apocalyptic number.

It is an amenable number.

251045216 is a deficient number, since it is larger than the sum of its proper divisors (243679168).

251045216 is a wasteful number, since it uses less digits than its factorization.

251045216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7614 (or 7606 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 251045216 is about 15844.4064578008. The cubic root of 251045216 is about 630.8372307111.

Adding to 251045216 its reverse (612540152), we get a palindrome (863585368).

The spelling of 251045216 in words is "two hundred fifty-one million, forty-five thousand, two hundred sixteen".