820525052 has 12 divisors (see below), whose sum is σ = 1453219656. Its totient is φ = 405319440.

The previous prime is 820525039. The next prime is 820525067. The reversal of 820525052 is 250525028.

It is a super-2 number, since 2×820525052² = 1346522721919205408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1235399 + ... + 1236062.

It is an arithmetic number, because the mean of its divisors is an integer number (121101638).

Almost surely, 2^820525052 is an apocalyptic number.

It is an amenable number.

820525052 is a deficient number, since it is larger than the sum of its proper divisors (632694604).

820525052 is a wasteful number, since it uses less digits than its factorization.

820525052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471548 (or 2471546 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 820525052 is about 28644.8084650605. The cubic root of 820525052 is about 936.1898934736.

The spelling of 820525052 in words is "eight hundred twenty million, five hundred twenty-five thousand, fifty-two".