221422534 has 8 divisors (see below), whose sum is σ = 332224200. Its totient is φ = 110681136.

The previous prime is 221422529. The next prime is 221422547. The reversal of 221422534 is 435224122.

221422534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 221422499 and 221422508.

It is a congruent 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, 4359 + ... + 21490.

It is an arithmetic number, because the mean of its divisors is an integer number (41528025).

Almost surely, 2^221422534 is an apocalyptic number.

221422534 is a deficient number, since it is larger than the sum of its proper divisors (110801666).

221422534 is a wasteful number, since it uses less digits than its factorization.

221422534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30134.

The product of its digits is 3840, while the sum is 25.

The square root of 221422534 is about 14880.2733173823. The cubic root of 221422534 is about 604.9794260244.

Adding to 221422534 its reverse (435224122), we get a palindrome (656646656).

The spelling of 221422534 in words is "two hundred twenty-one million, four hundred twenty-two thousand, five hundred thirty-four".