229406821 has 8 divisors (see below), whose sum is σ = 263629184. Its totient is φ = 195546960.

The previous prime is 229406813. The next prime is 229406833. The reversal of 229406821 is 128604922.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 229406821 - 2³ = 229406813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229406321) 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, 89265 + ... + 91798.

It is an arithmetic number, because the mean of its divisors is an integer number (32953648).

Almost surely, 2^229406821 is an apocalyptic number.

It is an amenable number.

229406821 is a deficient number, since it is larger than the sum of its proper divisors (34222363).

229406821 is a wasteful number, since it uses less digits than its factorization.

229406821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181251.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 229406821 is about 15146.1817300599. The cubic root of 229406821 is about 612.1653946941.

The spelling of 229406821 in words is "two hundred twenty-nine million, four hundred six thousand, eight hundred twenty-one".