251530413 has 8 divisors (see below), whose sum is σ = 335582208. Its totient is φ = 167582784.

The previous prime is 251530381. The next prime is 251530439. The reversal of 251530413 is 314035152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 251530413 - 2⁵ = 251530381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251530313) 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 7 ways as a sum of consecutive naturals, for example, 20220 + ... + 30197.

It is an arithmetic number, because the mean of its divisors is an integer number (41947776).

Almost surely, 2^251530413 is an apocalyptic number.

It is an amenable number.

251530413 is a deficient number, since it is larger than the sum of its proper divisors (84051795).

251530413 is a wasteful number, since it uses less digits than its factorization.

251530413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52083.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 251530413 is about 15859.7103693605. The cubic root of 251530413 is about 631.2433771419.

Adding to 251530413 its reverse (314035152), we get a palindrome (565565565).

The spelling of 251530413 in words is "two hundred fifty-one million, five hundred thirty thousand, four hundred thirteen".