229461905 has 4 divisors (see below), whose sum is σ = 275354292. Its totient is φ = 183569520.

The previous prime is 229461887. The next prime is 229461913. The reversal of 229461905 is 509164922.

It is a Cunningham number, because it is equal to 15148²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82591744 + 146870161 = 9088^2 + 12119^2 .

It is not a de Polignac number, because 229461905 - 2¹⁴ = 229445521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22946186 + ... + 22946195.

It is an arithmetic number, because the mean of its divisors is an integer number (68838573).

Almost surely, 2^229461905 is an apocalyptic number.

It is an amenable number.

229461905 is a deficient number, since it is larger than the sum of its proper divisors (45892387).

229461905 is an equidigital number, since it uses as much as digits as its factorization.

229461905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45892386.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 229461905 is about 15148.0000330077. Note that the first 4 decimals coincide. The cubic root of 229461905 is about 612.2143874542.

The spelling of 229461905 in words is "two hundred twenty-nine million, four hundred sixty-one thousand, nine hundred five".