251192449 has 4 divisors (see below), whose sum is σ = 255310420. Its totient is φ = 247074480.

The previous prime is 251192413. The next prime is 251192467. The reversal of 251192449 is 944291152.

251192449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4545424 + 246647025 = 2132^2 + 15705^2 .

It is a cyclic number.

It is not a de Polignac number, because 251192449 - 2⁹ = 251191937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251190449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2058894 + ... + 2059015.

It is an arithmetic number, because the mean of its divisors is an integer number (63827605).

Almost surely, 2^251192449 is an apocalyptic number.

It is an amenable number.

251192449 is a deficient number, since it is larger than the sum of its proper divisors (4117971).

251192449 is an equidigital number, since it uses as much as digits as its factorization.

251192449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117970.

The product of its digits is 25920, while the sum is 37.

The square root of 251192449 is about 15849.0519905766. The cubic root of 251192449 is about 630.9605310843.

The spelling of 251192449 in words is "two hundred fifty-one million, one hundred ninety-two thousand, four hundred forty-nine".