251032841 has 2 divisors, whose sum is σ = 251032842. Its totient is φ = 251032840.

The previous prime is 251032813. The next prime is 251032843. The reversal of 251032841 is 148230152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223951225 + 27081616 = 14965^2 + 5204^2 .

It is a cyclic number.

It is not a de Polignac number, because 251032841 - 2¹⁰ = 251031817 is a prime.

Together with 251032843, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251032841.

It is not a weakly prime, because it can be changed into another prime (251032843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125516420 + 125516421.

It is an arithmetic number, because the mean of its divisors is an integer number (125516421).

Almost surely, 2^251032841 is an apocalyptic number.

It is an amenable number.

251032841 is a deficient number, since it is larger than the sum of its proper divisors (1).

251032841 is an equidigital number, since it uses as much as digits as its factorization.

251032841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 251032841 is about 15844.0159366241. The cubic root of 251032841 is about 630.8268650631.

Adding to 251032841 its reverse (148230152), we get a palindrome (399262993).

The spelling of 251032841 in words is "two hundred fifty-one million, thirty-two thousand, eight hundred forty-one".