221426183 has 4 divisors (see below), whose sum is σ = 241555848. Its totient is φ = 201296520.

The previous prime is 221426131. The next prime is 221426243. The reversal of 221426183 is 381624122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221426183 - 2⁶ = 221426119 is a prime.

It is a super-4 number, since 4×221426183⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221426983) 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, 10064816 + ... + 10064837.

It is an arithmetic number, because the mean of its divisors is an integer number (60388962).

Almost surely, 2^221426183 is an apocalyptic number.

221426183 is a deficient number, since it is larger than the sum of its proper divisors (20129665).

221426183 is a wasteful number, since it uses less digits than its factorization.

221426183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20129664.

The product of its digits is 4608, while the sum is 29.

The square root of 221426183 is about 14880.3959288723. The cubic root of 221426183 is about 604.9827493203.

The spelling of 221426183 in words is "two hundred twenty-one million, four hundred twenty-six thousand, one hundred eighty-three".