520013251 has 8 divisors (see below), whose sum is σ = 537264000. Its totient is φ = 502792320.

The previous prime is 520013213. The next prime is 520013257. The reversal of 520013251 is 152310025.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520013251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520013257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31275 + ... + 44923.

It is an arithmetic number, because the mean of its divisors is an integer number (67158000).

Almost surely, 2^520013251 is an apocalyptic number.

520013251 is a deficient number, since it is larger than the sum of its proper divisors (17250749).

520013251 is a wasteful number, since it uses less digits than its factorization.

520013251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14909.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 520013251 is about 22803.7990475271. The cubic root of 520013251 is about 804.1519822543.

Adding to 520013251 its reverse (152310025), we get a palindrome (672323276).

The spelling of 520013251 in words is "five hundred twenty million, thirteen thousand, two hundred fifty-one".