8251536220 has 48 divisors (see below), whose sum is σ = 18497203200. Its totient is φ = 3082847040.

The previous prime is 8251536179. The next prime is 8251536263. The reversal of 8251536220 is 226351528.

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, 125940 + ... + 179899.

It is an arithmetic number, because the mean of its divisors is an integer number (385358400).

Almost surely, 2^8251536220 is an apocalyptic number.

It is an amenable number.

8251536220 is an abundant number, since it is smaller than the sum of its proper divisors (10245666980).

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

8251536220 is a wasteful number, since it uses less digits than its factorization.

8251536220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305938 (or 305936 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 8251536220 is about 90837.9668420644. The cubic root of 8251536220 is about 2020.7454213907.

Adding to 8251536220 its reverse (226351528), we get a palindrome (8477887748).

The spelling of 8251536220 in words is "eight billion, two hundred fifty-one million, five hundred thirty-six thousand, two hundred twenty".