251143201 has 2 divisors, whose sum is σ = 251143202. Its totient is φ = 251143200.

The previous prime is 251143169. The next prime is 251143223. The reversal of 251143201 is 102341152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144000000 + 107143201 = 12000^2 + 10351^2 .

It is a cyclic number.

It is not a de Polignac number, because 251143201 - 2⁵ = 251143169 is a prime.

It is not a weakly prime, because it can be changed into another prime (251143241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125571600 + 125571601.

It is an arithmetic number, because the mean of its divisors is an integer number (125571601).

Almost surely, 2^251143201 is an apocalyptic number.

It is an amenable number.

251143201 is a deficient number, since it is larger than the sum of its proper divisors (1).

251143201 is an equidigital number, since it uses as much as digits as its factorization.

251143201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 251143201 is about 15847.4982568227. The cubic root of 251143201 is about 630.9192936781.

Adding to 251143201 its reverse (102341152), we get a palindrome (353484353).

The spelling of 251143201 in words is "two hundred fifty-one million, one hundred forty-three thousand, two hundred one".