251493323 has 2 divisors, whose sum is σ = 251493324. Its totient is φ = 251493322.

The previous prime is 251493311. The next prime is 251493331. The reversal of 251493323 is 323394152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251493323 - 2²⁴ = 234716107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251493323.

It is not a weakly prime, because it can be changed into another prime (251493353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125746661 + 125746662.

It is an arithmetic number, because the mean of its divisors is an integer number (125746662).

Almost surely, 2^251493323 is an apocalyptic number.

251493323 is a deficient number, since it is larger than the sum of its proper divisors (1).

251493323 is an equidigital number, since it uses as much as digits as its factorization.

251493323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 32.

The square root of 251493323 is about 15858.5410110766. The cubic root of 251493323 is about 631.2123484650.

The spelling of 251493323 in words is "two hundred fifty-one million, four hundred ninety-three thousand, three hundred twenty-three".