85533220 has 12 divisors (see below), whose sum is σ = 179619804. Its totient is φ = 34213280.

The previous prime is 85533199. The next prime is 85533229. The reversal of 85533220 is 2233558.

It can be written as a sum of positive squares in 2 ways, for example, as 11985444 + 73547776 = 3462^2 + 8576^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (85533229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2138311 + ... + 2138350.

It is an arithmetic number, because the mean of its divisors is an integer number (14968317).

Almost surely, 2^85533220 is an apocalyptic number.

It is an amenable number.

85533220 is an abundant number, since it is smaller than the sum of its proper divisors (94086584).

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

85533220 is a wasteful number, since it uses less digits than its factorization.

85533220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4276670 (or 4276668 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 85533220 is about 9248.4171618715. The cubic root of 85533220 is about 440.6004543106.

Adding to 85533220 its reverse (2233558), we get a palindrome (87766778).

The spelling of 85533220 in words is "eighty-five million, five hundred thirty-three thousand, two hundred twenty".