515487228 has 12 divisors (see below), whose sum is σ = 1202803560. Its totient is φ = 171829072.

The previous prime is 515487221. The next prime is 515487229. The reversal of 515487228 is 822784515.

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

It is a super-2 number, since 2×515487228² = 531454164462247968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 515487228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515487221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21478623 + ... + 21478646.

It is an arithmetic number, because the mean of its divisors is an integer number (100233630).

Almost surely, 2^515487228 is an apocalyptic number.

It is an amenable number.

515487228 is an abundant number, since it is smaller than the sum of its proper divisors (687316332).

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

515487228 is a wasteful number, since it uses less digits than its factorization.

515487228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42957276 (or 42957274 counting only the distinct ones).

The product of its digits is 179200, while the sum is 42.

The square root of 515487228 is about 22704.3438134644. The cubic root of 515487228 is about 801.8121565945.

The spelling of 515487228 in words is "five hundred fifteen million, four hundred eighty-seven thousand, two hundred twenty-eight".