251252513 has 4 divisors (see below), whose sum is σ = 251291568. Its totient is φ = 251213460.

The previous prime is 251252467. The next prime is 251252531. The reversal of 251252513 is 315252152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 251252513 - 2¹⁰ = 251251489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251252543) 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 in 3 ways as a sum of consecutive naturals, for example, 7343 + ... + 23588.

It is an arithmetic number, because the mean of its divisors is an integer number (62822892).

Almost surely, 2^251252513 is an apocalyptic number.

It is an amenable number.

251252513 is a deficient number, since it is larger than the sum of its proper divisors (39055).

251252513 is an equidigital number, since it uses as much as digits as its factorization.

251252513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39054.

The product of its digits is 3000, while the sum is 26.

The square root of 251252513 is about 15850.9467540586. The cubic root of 251252513 is about 631.0108178839.

The spelling of 251252513 in words is "two hundred fifty-one million, two hundred fifty-two thousand, five hundred thirteen".