229821451 has 4 divisors (see below), whose sum is σ = 239813712. Its totient is φ = 219829192.

The previous prime is 229821437. The next prime is 229821463. The reversal of 229821451 is 154128922.

229821451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 229821451 - 2¹⁷ = 229690379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229821401) 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, 4996096 + ... + 4996141.

It is an arithmetic number, because the mean of its divisors is an integer number (59953428).

Almost surely, 2^229821451 is an apocalyptic number.

229821451 is a deficient number, since it is larger than the sum of its proper divisors (9992261).

229821451 is an equidigital number, since it uses as much as digits as its factorization.

229821451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9992260.

The product of its digits is 11520, while the sum is 34.

The square root of 229821451 is about 15159.8631590130. The cubic root of 229821451 is about 612.5339820657.

The spelling of 229821451 in words is "two hundred twenty-nine million, eight hundred twenty-one thousand, four hundred fifty-one".