651816228 has 72 divisors (see below), whose sum is σ = 1846176192. Its totient is φ = 178132416.

The previous prime is 651816167. The next prime is 651816229. The reversal of 651816228 is 822618156.

It is not an unprimeable number, because it can be changed into a prime (651816229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10575 + ... + 37622.

It is an arithmetic number, because the mean of its divisors is an integer number (25641336).

Almost surely, 2^651816228 is an apocalyptic number.

It is an amenable number.

651816228 is an abundant number, since it is smaller than the sum of its proper divisors (1194359964).

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

651816228 is a wasteful number, since it uses less digits than its factorization.

651816228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48241 (or 48232 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 651816228 is about 25530.6918825166. The cubic root of 651816228 is about 867.0451692536.

The spelling of 651816228 in words is "six hundred fifty-one million, eight hundred sixteen thousand, two hundred twenty-eight".