85532220 has 48 divisors (see below), whose sum is σ = 266101920. Its totient is φ = 22808448.

The previous prime is 85532201. The next prime is 85532221. The reversal of 85532220 is 2223558.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85532221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78657 + ... + 79736.

It is an arithmetic number, because the mean of its divisors is an integer number (5543790).

Almost surely, 2^85532220 is an apocalyptic number.

It is an amenable number.

85532220 is an abundant number, since it is smaller than the sum of its proper divisors (180569700).

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

85532220 is a wasteful number, since it uses less digits than its factorization.

85532220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158411 (or 158403 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 85532220 is about 9248.3630984083. The cubic root of 85532220 is about 440.5987372305.

Adding to 85532220 its reverse (2223558), we get a palindrome (87755778).

The spelling of 85532220 in words is "eighty-five million, five hundred thirty-two thousand, two hundred twenty".