229186021 has 4 divisors (see below), whose sum is σ = 231411232. Its totient is φ = 226960812.

The previous prime is 229186019. The next prime is 229186033. The reversal of 229186021 is 120681922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 229186021 - 2¹ = 229186019 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 (229186081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112451 + ... + 1112656.

It is an arithmetic number, because the mean of its divisors is an integer number (57852808).

Almost surely, 2^229186021 is an apocalyptic number.

It is an amenable number.

229186021 is a deficient number, since it is larger than the sum of its proper divisors (2225211).

229186021 is a wasteful number, since it uses less digits than its factorization.

229186021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225210.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 229186021 is about 15138.8910095819. The cubic root of 229186021 is about 611.9689322019.

The spelling of 229186021 in words is "two hundred twenty-nine million, one hundred eighty-six thousand, twenty-one".