221892634 has 8 divisors (see below), whose sum is σ = 332958528. Its totient is φ = 110906460.

The previous prime is 221892631. The next prime is 221892673. The reversal of 221892634 is 436298122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221892593 and 221892602.

It is not an unprimeable number, because it can be changed into a prime (221892631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12402 + ... + 24445.

It is an arithmetic number, because the mean of its divisors is an integer number (41619816).

Almost surely, 2^221892634 is an apocalyptic number.

221892634 is a deficient number, since it is larger than the sum of its proper divisors (111065894).

221892634 is a wasteful number, since it uses less digits than its factorization.

221892634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39860.

The product of its digits is 41472, while the sum is 37.

The square root of 221892634 is about 14896.0610229685. The cubic root of 221892634 is about 605.4072653392.

The spelling of 221892634 in words is "two hundred twenty-one million, eight hundred ninety-two thousand, six hundred thirty-four".