521852985 has 24 divisors (see below), whose sum is σ = 923794560. Its totient is φ = 272398752.

The previous prime is 521852971. The next prime is 521853001. The reversal of 521852985 is 589258125.

It is a happy number.

It is not a de Polignac number, because 521852985 - 2⁷ = 521852857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 521852985.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121255 + ... + 125484.

It is an arithmetic number, because the mean of its divisors is an integer number (38491440).

Almost surely, 2^521852985 is an apocalyptic number.

It is an amenable number.

521852985 is a deficient number, since it is larger than the sum of its proper divisors (401941575).

521852985 is a wasteful number, since it uses less digits than its factorization.

521852985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246797 (or 246794 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The square root of 521852985 is about 22844.1017551577. The cubic root of 521852985 is about 805.0991917687.

The spelling of 521852985 in words is "five hundred twenty-one million, eight hundred fifty-two thousand, nine hundred eighty-five".