229138647 has 4 divisors (see below), whose sum is σ = 305518200. Its totient is φ = 152759096.

The previous prime is 229138603. The next prime is 229138691. The reversal of 229138647 is 746831922.

229138647 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 an interprime number because it is at equal distance from previous prime (229138603) and next prime (229138691).

It is a cyclic number.

It is not a de Polignac number, because 229138647 - 2²⁴ = 212361431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 229138599 and 229138608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229138697) 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, 38189772 + ... + 38189777.

It is an arithmetic number, because the mean of its divisors is an integer number (76379550).

Almost surely, 2^229138647 is an apocalyptic number.

229138647 is a deficient number, since it is larger than the sum of its proper divisors (76379553).

229138647 is an equidigital number, since it uses as much as digits as its factorization.

229138647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76379552.

The product of its digits is 145152, while the sum is 42.

The square root of 229138647 is about 15137.3262830660. The cubic root of 229138647 is about 611.9267635248.

The spelling of 229138647 in words is "two hundred twenty-nine million, one hundred thirty-eight thousand, six hundred forty-seven".