229831785 has 12 divisors (see below), whose sum is σ = 398375172. Its totient is φ = 122576928.

The previous prime is 229831781. The next prime is 229831787. The reversal of 229831785 is 587138922.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 77580864 + 152250921 = 8808^2 + 12339^2 .

It is not a de Polignac number, because 229831785 - 2² = 229831781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 5107373 = 229831785 / (2 + 2 + 9 + 8 + 3 + 1 + 7 + 8 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 229831785.

It is not an unprimeable number, because it can be changed into a prime (229831781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2553642 + ... + 2553731.

It is an arithmetic number, because the mean of its divisors is an integer number (33197931).

Almost surely, 2^229831785 is an apocalyptic number.

It is an amenable number.

229831785 is a deficient number, since it is larger than the sum of its proper divisors (168543387).

229831785 is a wasteful number, since it uses less digits than its factorization.

229831785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5107384 (or 5107381 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 229831785 is about 15160.2039893928. The cubic root of 229831785 is about 612.5431628613.

The spelling of 229831785 in words is "two hundred twenty-nine million, eight hundred thirty-one thousand, seven hundred eighty-five".