521325103 has 4 divisors (see below), whose sum is σ = 561427048. Its totient is φ = 481223160.

The previous prime is 521325071. The next prime is 521325137. The reversal of 521325103 is 301523125.

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

It is a cyclic number.

It is not a de Polignac number, because 521325103 - 2⁵ = 521325071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521329103) 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, 20050953 + ... + 20050978.

It is an arithmetic number, because the mean of its divisors is an integer number (140356762).

Almost surely, 2^521325103 is an apocalyptic number.

521325103 is a deficient number, since it is larger than the sum of its proper divisors (40101945).

521325103 is a wasteful number, since it uses less digits than its factorization.

521325103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40101944.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 521325103 is about 22832.5448209349. The cubic root of 521325103 is about 804.8276333242.

Adding to 521325103 its reverse (301523125), we get a palindrome (822848228).

The spelling of 521325103 in words is "five hundred twenty-one million, three hundred twenty-five thousand, one hundred three".