229363821 has 6 divisors (see below), whose sum is σ = 331303310. Its totient is φ = 152909208.

The previous prime is 229363819. The next prime is 229363921. The reversal of 229363821 is 128363922.

It can be written as a sum of positive squares in only one way, i.e., 156875625 + 72488196 = 12525^2 + 8514^2 .

It is not a de Polignac number, because 229363821 - 2¹ = 229363819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229363811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12742426 + ... + 12742443.

Almost surely, 2^229363821 is an apocalyptic number.

It is an amenable number.

229363821 is a deficient number, since it is larger than the sum of its proper divisors (101939489).

229363821 is a wasteful number, since it uses less digits than its factorization.

229363821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25484875 (or 25484872 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 229363821 is about 15144.7621638638. The cubic root of 229363821 is about 612.1271442232.

The spelling of 229363821 in words is "two hundred twenty-nine million, three hundred sixty-three thousand, eight hundred twenty-one".