229591881 has 8 divisors (see below), whose sum is σ = 340136160. Its totient is φ = 153061236.

The previous prime is 229591867. The next prime is 229591883. The reversal of 229591881 is 188195922.

It is not a de Polignac number, because 229591881 - 2¹³ = 229583689 is a prime.

It is a super-2 number, since 2×229591881² = 105424863642236322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (229591883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4251675 + ... + 4251728.

It is an arithmetic number, because the mean of its divisors is an integer number (42517020).

Almost surely, 2^229591881 is an apocalyptic number.

It is an amenable number.

229591881 is a deficient number, since it is larger than the sum of its proper divisors (110544279).

229591881 is an equidigital number, since it uses as much as digits as its factorization.

229591881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8503412 (or 8503406 counting only the distinct ones).

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

The square root of 229591881 is about 15152.2896289637. The cubic root of 229591881 is about 612.3299595176.

The spelling of 229591881 in words is "two hundred twenty-nine million, five hundred ninety-one thousand, eight hundred eighty-one".