515115228 has 12 divisors (see below), whose sum is σ = 1201935560. Its totient is φ = 171705072.

The previous prime is 515115217. The next prime is 515115233. The reversal of 515115228 is 822511515.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 515115195 and 515115204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21463123 + ... + 21463146.

Almost surely, 2^515115228 is an apocalyptic number.

It is an amenable number.

515115228 is an abundant number, since it is smaller than the sum of its proper divisors (686820332).

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

515115228 is a wasteful number, since it uses less digits than its factorization.

515115228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42926276 (or 42926274 counting only the distinct ones).

The product of its digits is 4000, while the sum is 30.

The square root of 515115228 is about 22696.1500700009. The cubic root of 515115228 is about 801.6192349698.

The spelling of 515115228 in words is "five hundred fifteen million, one hundred fifteen thousand, two hundred twenty-eight".