285205243425 has 96 divisors (see below), whose sum is σ = 522455132160. Its totient is φ = 136550937600.

The previous prime is 285205243417. The next prime is 285205243429. The reversal of 285205243425 is 524342502582.

It is not a de Polignac number, because 285205243425 - 2³ = 285205243417 is a prime.

It is a super-2 number, since 2×285205243425² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (285205243429) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 10514130 + ... + 10541220.

It is an arithmetic number, because the mean of its divisors is an integer number (5442240960).

Almost surely, 2^285205243425 is an apocalyptic number.

285205243425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

285205243425 is a deficient number, since it is larger than the sum of its proper divisors (237249888735).

285205243425 is a wasteful number, since it uses less digits than its factorization.

285205243425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27503 (or 27498 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 42.

The spelling of 285205243425 in words is "two hundred eighty-five billion, two hundred five million, two hundred forty-three thousand, four hundred twenty-five".