85521243 has 8 divisors (see below), whose sum is σ = 114274368. Its totient is φ = 56891144.

The previous prime is 85521239. The next prime is 85521251. The reversal of 85521243 is 34212558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85521243 - 2² = 85521239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85521243.

It is not an unprimeable number, because it can be changed into a prime (85521253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29121 + ... + 31922.

It is an arithmetic number, because the mean of its divisors is an integer number (14284296).

Almost surely, 2^85521243 is an apocalyptic number.

85521243 is a deficient number, since it is larger than the sum of its proper divisors (28753125).

85521243 is a wasteful number, since it uses less digits than its factorization.

85521243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61513.

The product of its digits is 9600, while the sum is 30.

The square root of 85521243 is about 9247.7696229956. The cubic root of 85521243 is about 440.5798879624.

The spelling of 85521243 in words is "eighty-five million, five hundred twenty-one thousand, two hundred forty-three".