229227021 has 6 divisors (see below), whose sum is σ = 331105710. Its totient is φ = 152818008.

The previous prime is 229227013. The next prime is 229227029. The reversal of 229227021 is 120722922.

It is an interprime number because it is at equal distance from previous prime (229227013) and next prime (229227029).

It can be written as a sum of positive squares in only one way, i.e., 133402500 + 95824521 = 11550^2 + 9789^2 .

It is not a de Polignac number, because 229227021 - 2³ = 229227013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229227029) 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, 12734826 + ... + 12734843.

It is an arithmetic number, because the mean of its divisors is an integer number (55184285).

Almost surely, 2^229227021 is an apocalyptic number.

It is an amenable number.

229227021 is a deficient number, since it is larger than the sum of its proper divisors (101878689).

229227021 is a wasteful number, since it uses less digits than its factorization.

229227021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25469675 (or 25469672 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 229227021 is about 15140.2450772767. The cubic root of 229227021 is about 612.0054225458.

Adding to 229227021 its reverse (120722922), we get a palindrome (349949943).

The spelling of 229227021 in words is "two hundred twenty-nine million, two hundred twenty-seven thousand, twenty-one".