251493371 has 2 divisors, whose sum is σ = 251493372. Its totient is φ = 251493370.

The previous prime is 251493353. The next prime is 251493383. The reversal of 251493371 is 173394152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251493371 - 2²² = 247299067 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (251493311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125746685 + 125746686.

It is an arithmetic number, because the mean of its divisors is an integer number (125746686).

Almost surely, 2^251493371 is an apocalyptic number.

251493371 is a deficient number, since it is larger than the sum of its proper divisors (1).

251493371 is an equidigital number, since it uses as much as digits as its factorization.

251493371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 251493371 is about 15858.5425244567. The cubic root of 251493371 is about 631.2123886227.

The spelling of 251493371 in words is "two hundred fifty-one million, four hundred ninety-three thousand, three hundred seventy-one".