229891805 has 32 divisors (see below), whose sum is σ = 331043328. Its totient is φ = 151027200.

The previous prime is 229891801. The next prime is 229891813. The reversal of 229891805 is 508198922.

It is not a de Polignac number, because 229891805 - 2² = 229891801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229891801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30185 + ... + 37025.

It is an arithmetic number, because the mean of its divisors is an integer number (10345104).

Almost surely, 2^229891805 is an apocalyptic number.

It is an amenable number.

229891805 is a deficient number, since it is larger than the sum of its proper divisors (101151523).

229891805 is a wasteful number, since it uses less digits than its factorization.

229891805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6917.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 229891805 is about 15162.1833849878. The cubic root of 229891805 is about 612.5964795958.

The spelling of 229891805 in words is "two hundred twenty-nine million, eight hundred ninety-one thousand, eight hundred five".