85521232 has 40 divisors (see below), whose sum is σ = 172701000. Its totient is φ = 40975872.

The previous prime is 85521217. The next prime is 85521239. The reversal of 85521232 is 23212558.

It can be written as a sum of positive squares in 4 ways, for example, as 8503056 + 77018176 = 2916^2 + 8776^2 .

It is a super-2 number, since 2×85521232² = 14627762245595648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85521232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85521239) 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, 68518 + ... + 69754.

It is an arithmetic number, because the mean of its divisors is an integer number (4317525).

Almost surely, 2^85521232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85521232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86350500).

85521232 is an abundant number, since it is smaller than the sum of its proper divisors (87179768).

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

85521232 is a wasteful number, since it uses less digits than its factorization.

85521232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423 (or 1417 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 85521232 is about 9247.7690282576. The cubic root of 85521232 is about 440.5798690728.

The spelling of 85521232 in words is "eighty-five million, five hundred twenty-one thousand, two hundred thirty-two".