158215228 has 24 divisors (see below), whose sum is σ = 284385024. Its totient is φ = 76972800.

The previous prime is 158215217. The next prime is 158215237. The reversal of 158215228 is 822512851.

It is a happy number.

158215228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 158215193 and 158215202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73893 + ... + 76003.

It is an arithmetic number, because the mean of its divisors is an integer number (11849376).

Almost surely, 2^158215228 is an apocalyptic number.

It is an amenable number.

158215228 is a deficient number, since it is larger than the sum of its proper divisors (126169796).

158215228 is a wasteful number, since it uses less digits than its factorization.

158215228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613 (or 2611 counting only the distinct ones).

The product of its digits is 12800, while the sum is 34.

The square root of 158215228 is about 12578.3634865590. The cubic root of 158215228 is about 540.8573805504.

The spelling of 158215228 in words is "one hundred fifty-eight million, two hundred fifteen thousand, two hundred twenty-eight".