251360149 has 2 divisors, whose sum is σ = 251360150. Its totient is φ = 251360148.

The previous prime is 251360099. The next prime is 251360159. The reversal of 251360149 is 941063152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232715025 + 18645124 = 15255^2 + 4318^2 .

It is a cyclic number.

It is not a de Polignac number, because 251360149 - 2¹³ = 251351957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251360149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251360159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125680074 + 125680075.

It is an arithmetic number, because the mean of its divisors is an integer number (125680075).

Almost surely, 2^251360149 is an apocalyptic number.

It is an amenable number.

251360149 is a deficient number, since it is larger than the sum of its proper divisors (1).

251360149 is an equidigital number, since it uses as much as digits as its factorization.

251360149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 251360149 is about 15854.3416451141. The cubic root of 251360149 is about 631.1009128818.

The spelling of 251360149 in words is "two hundred fifty-one million, three hundred sixty thousand, one hundred forty-nine".