521313102 has 24 divisors (see below), whose sum is σ = 1129968840. Its totient is φ = 173700720.

The previous prime is 521313047. The next prime is 521313103. The reversal of 521313102 is 201313125.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521313103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59649 + ... + 67827.

It is an arithmetic number, because the mean of its divisors is an integer number (47082035).

Almost surely, 2^521313102 is an apocalyptic number.

521313102 is an abundant number, since it is smaller than the sum of its proper divisors (608655738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521313102 is a wasteful number, since it uses less digits than its factorization.

521313102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11728 (or 11725 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 521313102 is about 22832.2820147264. The cubic root of 521313102 is about 804.8214575167.

Adding to 521313102 its reverse (201313125), we get a palindrome (722626227).

The spelling of 521313102 in words is "five hundred twenty-one million, three hundred thirteen thousand, one hundred two".