251502151 has 2 divisors, whose sum is σ = 251502152. Its totient is φ = 251502150.

The previous prime is 251502149. The next prime is 251502161. The reversal of 251502151 is 151205152.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251502151 - 2¹ = 251502149 is a prime.

Together with 251502149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251502161) 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, 125751075 + 125751076.

It is an arithmetic number, because the mean of its divisors is an integer number (125751076).

Almost surely, 2^251502151 is an apocalyptic number.

251502151 is a deficient number, since it is larger than the sum of its proper divisors (1).

251502151 is an equidigital number, since it uses as much as digits as its factorization.

251502151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 251502151 is about 15858.8193444531. The cubic root of 251502151 is about 631.2197340519.

The spelling of 251502151 in words is "two hundred fifty-one million, five hundred two thousand, one hundred fifty-one".