229456821 has 16 divisors (see below), whose sum is σ = 335236608. Its totient is φ = 138447600.

The previous prime is 229456819. The next prime is 229456883. The reversal of 229456821 is 128654922.

It is not a de Polignac number, because 229456821 - 2¹ = 229456819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 229456821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229456811) 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, 7825 + ... + 22806.

It is an arithmetic number, because the mean of its divisors is an integer number (20952288).

Almost surely, 2^229456821 is an apocalyptic number.

It is an amenable number.

229456821 is a deficient number, since it is larger than the sum of its proper divisors (105779787).

229456821 is a wasteful number, since it uses less digits than its factorization.

229456821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30872.

The product of its digits is 69120, while the sum is 39.

The square root of 229456821 is about 15147.8322211464. The cubic root of 229456821 is about 612.2098659761.

The spelling of 229456821 in words is "two hundred twenty-nine million, four hundred fifty-six thousand, eight hundred twenty-one".