521045352 has 32 divisors (see below), whose sum is σ = 1447348800. Its totient is φ = 173681712.

The previous prime is 521045339. The next prime is 521045383. The reversal of 521045352 is 253540125.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1205908 + ... + 1206339.

It is an arithmetic number, because the mean of its divisors is an integer number (45229650).

Almost surely, 2^521045352 is an apocalyptic number.

It is an amenable number.

521045352 is an abundant number, since it is smaller than the sum of its proper divisors (926303448).

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

521045352 is a wasteful number, since it uses less digits than its factorization.

521045352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412262 (or 2412252 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 521045352 is about 22826.4178530053. The cubic root of 521045352 is about 804.6836466390.

Adding to 521045352 its reverse (253540125), we get a palindrome (774585477).

The spelling of 521045352 in words is "five hundred twenty-one million, forty-five thousand, three hundred fifty-two".