251040353 has 2 divisors, whose sum is σ = 251040354. Its totient is φ = 251040352.

The previous prime is 251040341. The next prime is 251040359. The reversal of 251040353 is 353040152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250652224 + 388129 = 15832^2 + 623^2 .

It is a cyclic number.

It is not a de Polignac number, because 251040353 - 2⁴ = 251040337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (251040359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125520176 + 125520177.

It is an arithmetic number, because the mean of its divisors is an integer number (125520177).

Almost surely, 2^251040353 is an apocalyptic number.

It is an amenable number.

251040353 is a deficient number, since it is larger than the sum of its proper divisors (1).

251040353 is an equidigital number, since it uses as much as digits as its factorization.

251040353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 251040353 is about 15844.2529959604. The cubic root of 251040353 is about 630.8331573662.

The spelling of 251040353 in words is "two hundred fifty-one million, forty thousand, three hundred fifty-three".