521346852 has 72 divisors (see below), whose sum is σ = 1493943360. Its totient is φ = 151968960.

The previous prime is 521346851. The next prime is 521346863. The reversal of 521346852 is 258643125.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (521346851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20424 + ... + 38207.

Almost surely, 2^521346852 is an apocalyptic number.

521346852 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

521346852 is an abundant number, since it is smaller than the sum of its proper divisors (972596508).

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

521346852 is a wasteful number, since it uses less digits than its factorization.

521346852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58673 (or 58668 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 521346852 is about 22833.0210878894. The cubic root of 521346852 is about 804.8388252866.

Adding to 521346852 its reverse (258643125), we get a palindrome (779989977).

The spelling of 521346852 in words is "five hundred twenty-one million, three hundred forty-six thousand, eight hundred fifty-two".