223729229 has 4 divisors (see below), whose sum is σ = 231444060. Its totient is φ = 216014400.

The previous prime is 223729223. The next prime is 223729279. The reversal of 223729229 is 922927322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 922927322 = 2 ⋅461463661.

It can be written as a sum of positive squares in 2 ways, for example, as 165817129 + 57912100 = 12877^2 + 7610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223729229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223729192 and 223729201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223729223) 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, 3857372 + ... + 3857429.

It is an arithmetic number, because the mean of its divisors is an integer number (57861015).

Almost surely, 2^223729229 is an apocalyptic number.

223729229 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

223729229 is a deficient number, since it is larger than the sum of its proper divisors (7714831).

223729229 is an equidigital number, since it uses as much as digits as its factorization.

223729229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7714830.

The product of its digits is 54432, while the sum is 38.

The square root of 223729229 is about 14957.5809875795. The cubic root of 223729229 is about 607.0729873052.

The spelling of 223729229 in words is "two hundred twenty-three million, seven hundred twenty-nine thousand, two hundred twenty-nine".