85551224 has 48 divisors (see below), whose sum is σ = 184754520. Its totient is φ = 36826560.

The previous prime is 85551211. The next prime is 85551229. The reversal of 85551224 is 42215558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85551229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30422 + ... + 33114.

Almost surely, 2^85551224 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 85551224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92377260).

85551224 is an abundant number, since it is smaller than the sum of its proper divisors (99203296).

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

85551224 is a wasteful number, since it uses less digits than its factorization.

85551224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748 (or 2725 counting only the distinct ones).

The product of its digits is 16000, while the sum is 32.

The square root of 85551224 is about 9249.3904664037. The cubic root of 85551224 is about 440.6313663316.

It can be divided in two parts, 8555 and 1224, that added together give a palindrome (9779).

The spelling of 85551224 in words is "eighty-five million, five hundred fifty-one thousand, two hundred twenty-four".