221807234 has 16 divisors (see below), whose sum is σ = 363613536. Its totient is φ = 100639200.

The previous prime is 221807233. The next prime is 221807237. The reversal of 221807234 is 432708122.

It is a junction number, because it is equal to n+sod(n) for n = 221807197 and 221807206.

It is not an unprimeable number, because it can be changed into a prime (221807231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3734 + ... + 21390.

It is an arithmetic number, because the mean of its divisors is an integer number (22725846).

Almost surely, 2^221807234 is an apocalyptic number.

221807234 is a deficient number, since it is larger than the sum of its proper divisors (141806302).

221807234 is a wasteful number, since it uses less digits than its factorization.

221807234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18241.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 221807234 is about 14893.1942174941. The cubic root of 221807234 is about 605.3295875095.

The spelling of 221807234 in words is "two hundred twenty-one million, eight hundred seven thousand, two hundred thirty-four".