817224252 has 48 divisors (see below), whose sum is σ = 2062153632. Its totient is φ = 250398720.

The previous prime is 817224241. The next prime is 817224283. The reversal of 817224252 is 252422718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26728 + ... + 48464.

It is an arithmetic number, because the mean of its divisors is an integer number (42961534).

Almost surely, 2^817224252 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 817224252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031076816).

817224252 is an abundant number, since it is smaller than the sum of its proper divisors (1244929380).

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

817224252 is a wasteful number, since it uses less digits than its factorization.

817224252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21998 (or 21996 counting only the distinct ones).

The product of its digits is 17920, while the sum is 33.

The square root of 817224252 is about 28587.1343789475. The cubic root of 817224252 is about 934.9328412209.

The spelling of 817224252 in words is "eight hundred seventeen million, two hundred twenty-four thousand, two hundred fifty-two".