229821771 has 16 divisors (see below), whose sum is σ = 310786560. Its totient is φ = 151044000.

The previous prime is 229821731. The next prime is 229821791. The reversal of 229821771 is 177128922.

It is not a de Polignac number, because 229821771 - 2⁶ = 229821707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (229821731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186385 + ... + 187613.

It is an arithmetic number, because the mean of its divisors is an integer number (19424160).

Almost surely, 2^229821771 is an apocalyptic number.

229821771 is a deficient number, since it is larger than the sum of its proper divisors (80964789).

229821771 is a wasteful number, since it uses less digits than its factorization.

229821771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066.

The product of its digits is 28224, while the sum is 39.

The square root of 229821771 is about 15159.8737131943. The cubic root of 229821771 is about 612.5342663600.

It can be divided in two parts, 22982 and 1771, that added together give a triangular number (24753 = T₂₂₂).

The spelling of 229821771 in words is "two hundred twenty-nine million, eight hundred twenty-one thousand, seven hundred seventy-one".