988159221 has 72 divisors (see below), whose sum is σ = 1771848000. Its totient is φ = 518047488.

The previous prime is 988159169. The next prime is 988159223. The reversal of 988159221 is 122951889.

It is not a de Polignac number, because 988159221 - 2¹¹ = 988157173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988159223) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1980030 + ... + 1980528.

It is an arithmetic number, because the mean of its divisors is an integer number (24609000).

Almost surely, 2^988159221 is an apocalyptic number.

It is an amenable number.

988159221 is a deficient number, since it is larger than the sum of its proper divisors (783688779).

988159221 is a wasteful number, since it uses less digits than its factorization.

988159221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 569 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 988159221 is about 31434.9999363767. Note that the first 4 decimals coincide. The cubic root of 988159221 is about 996.0373921463.

The spelling of 988159221 in words is "nine hundred eighty-eight million, one hundred fifty-nine thousand, two hundred twenty-one".