159217928 has 8 divisors (see below), whose sum is σ = 298533630. Its totient is φ = 79608960.

The previous prime is 159217913. The next prime is 159217969. The reversal of 159217928 is 829712951.

It is a happy number.

159217928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 149866564 + 9351364 = 12242^2 + 3058^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×159217928² = 50700697193226368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9951113 + ... + 9951128.

Almost surely, 2^159217928 is an apocalyptic number.

It is an amenable number.

159217928 is a deficient number, since it is larger than the sum of its proper divisors (139315702).

159217928 is a wasteful number, since it uses less digits than its factorization.

159217928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19902247 (or 19902243 counting only the distinct ones).

The product of its digits is 90720, while the sum is 44.

The square root of 159217928 is about 12618.1586612310. The cubic root of 159217928 is about 541.9975490419.

The spelling of 159217928 in words is "one hundred fifty-nine million, two hundred seventeen thousand, nine hundred twenty-eight".