221607834 has 16 divisors (see below), whose sum is σ = 506532288. Its totient is φ = 63316512.

The previous prime is 221607833. The next prime is 221607847. The reversal of 221607834 is 438706122.

It is a super-2 number, since 2×221607834² = 98220064180343112, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221607795 and 221607804.

It is not an unprimeable number, because it can be changed into a prime (221607833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2638147 + ... + 2638230.

It is an arithmetic number, because the mean of its divisors is an integer number (31658268).

Almost surely, 2^221607834 is an apocalyptic number.

221607834 is an abundant number, since it is smaller than the sum of its proper divisors (284924454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221607834 is a wasteful number, since it uses less digits than its factorization.

221607834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276389.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 221607834 is about 14886.4983794041. The cubic root of 221607834 is about 605.1481403051.

The spelling of 221607834 in words is "two hundred twenty-one million, six hundred seven thousand, eight hundred thirty-four".