229221081 has 24 divisors (see below), whose sum is σ = 351322920. Its totient is φ = 143517696.

The previous prime is 229221079. The next prime is 229221173. The reversal of 229221081 is 180122922.

It can be written as a sum of positive squares in 4 ways, for example, as 6734025 + 222487056 = 2595^2 + 14916^2 .

It is not a de Polignac number, because 229221081 - 2¹ = 229221079 is a prime.

It is a super-2 number, since 2×229221081² = 105084607949617122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (229221001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85741 + ... + 88373.

It is an arithmetic number, because the mean of its divisors is an integer number (14638455).

Almost surely, 2^229221081 is an apocalyptic number.

It is an amenable number.

229221081 is a deficient number, since it is larger than the sum of its proper divisors (122101839).

229221081 is a wasteful number, since it uses less digits than its factorization.

229221081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225 (or 3222 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 229221081 is about 15140.0489100927. The cubic root of 229221081 is about 612.0001361655. Note that the first 3 decimals are identical.

The spelling of 229221081 in words is "two hundred twenty-nine million, two hundred twenty-one thousand, eighty-one".