251348085 has 12 divisors (see below), whose sum is σ = 435670092. Its totient is φ = 134052288.

The previous prime is 251348063. The next prime is 251348129. The reversal of 251348085 is 580843152.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 134513604 + 116834481 = 11598^2 + 10809^2 .

It is not a de Polignac number, because 251348085 - 2⁹ = 251347573 is a prime.

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 in 11 ways as a sum of consecutive naturals, for example, 2792712 + ... + 2792801.

It is an arithmetic number, because the mean of its divisors is an integer number (36305841).

Almost surely, 2^251348085 is an apocalyptic number.

It is an amenable number.

251348085 is a deficient number, since it is larger than the sum of its proper divisors (184322007).

251348085 is a wasteful number, since it uses less digits than its factorization.

251348085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5585524 (or 5585521 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 251348085 is about 15853.9611769425. The cubic root of 251348085 is about 631.0908161829.

The spelling of 251348085 in words is "two hundred fifty-one million, three hundred forty-eight thousand, eighty-five".