251348129 has 2 divisors, whose sum is σ = 251348130. Its totient is φ = 251348128.

The previous prime is 251348063. The next prime is 251348143. The reversal of 251348129 is 921843152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214563904 + 36784225 = 14648^2 + 6065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251348129 is a prime.

It is not a weakly prime, because it can be changed into another prime (251348159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125674064 + 125674065.

It is an arithmetic number, because the mean of its divisors is an integer number (125674065).

Almost surely, 2^251348129 is an apocalyptic number.

It is an amenable number.

251348129 is a deficient number, since it is larger than the sum of its proper divisors (1).

251348129 is an equidigital number, since it uses as much as digits as its factorization.

251348129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 251348129 is about 15853.9625646083. The cubic root of 251348129 is about 631.0908530083.

The spelling of 251348129 in words is "two hundred fifty-one million, three hundred forty-eight thousand, one hundred twenty-nine".