221426983 has 2 divisors, whose sum is σ = 221426984. Its totient is φ = 221426982.

The previous prime is 221426971. The next prime is 221427001. The reversal of 221426983 is 389624122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221426983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221426903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110713491 + 110713492.

It is an arithmetic number, because the mean of its divisors is an integer number (110713492).

Almost surely, 2^221426983 is an apocalyptic number.

221426983 is a deficient number, since it is larger than the sum of its proper divisors (1).

221426983 is an equidigital number, since it uses as much as digits as its factorization.

221426983 is an odious number, because the sum of its binary digits is odd.

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

The square root of 221426983 is about 14880.4228098532. The cubic root of 221426983 is about 604.9834779087.

The spelling of 221426983 in words is "two hundred twenty-one million, four hundred twenty-six thousand, nine hundred eighty-three".