251155379 has 2 divisors, whose sum is σ = 251155380. Its totient is φ = 251155378.

The previous prime is 251155367. The next prime is 251155417. The reversal of 251155379 is 973551152.

It is an a-pointer prime, because the next prime (251155417) can be obtained adding 251155379 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251155379 - 2⁴ = 251155363 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (251155579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125577689 + 125577690.

It is an arithmetic number, because the mean of its divisors is an integer number (125577690).

Almost surely, 2^251155379 is an apocalyptic number.

251155379 is a deficient number, since it is larger than the sum of its proper divisors (1).

251155379 is an equidigital number, since it uses as much as digits as its factorization.

251155379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47250, while the sum is 38.

The square root of 251155379 is about 15847.8824768484. The cubic root of 251155379 is about 630.9294913275.

The spelling of 251155379 in words is "two hundred fifty-one million, one hundred fifty-five thousand, three hundred seventy-nine".