251355241 has 2 divisors, whose sum is σ = 251355242. Its totient is φ = 251355240.

The previous prime is 251355233. The next prime is 251355259. The reversal of 251355241 is 142553152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184851216 + 66504025 = 13596^2 + 8155^2 .

It is a cyclic number.

It is not a de Polignac number, because 251355241 - 2³ = 251355233 is a prime.

It is not a weakly prime, because it can be changed into another prime (251355271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125677620 + 125677621.

It is an arithmetic number, because the mean of its divisors is an integer number (125677621).

Almost surely, 2^251355241 is an apocalyptic number.

It is an amenable number.

251355241 is a deficient number, since it is larger than the sum of its proper divisors (1).

251355241 is an equidigital number, since it uses as much as digits as its factorization.

251355241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6000, while the sum is 28.

The square root of 251355241 is about 15854.1868602587. The cubic root of 251355241 is about 631.0968052783.

The spelling of 251355241 in words is "two hundred fifty-one million, three hundred fifty-five thousand, two hundred forty-one".