222251206643 has 4 divisors (see below), whose sum is σ = 231914302608. Its totient is φ = 212588110680.

The previous prime is 222251206633. The next prime is 222251206669. The reversal of 222251206643 is 346602152222.

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 222251206643 - 2¹⁰ = 222251205619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222251206633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4831547948 + ... + 4831547993.

It is an arithmetic number, because the mean of its divisors is an integer number (57978575652).

Almost surely, 2^222251206643 is an apocalyptic number.

222251206643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

222251206643 is a deficient number, since it is larger than the sum of its proper divisors (9663095965).

222251206643 is an equidigital number, since it uses as much as digits as its factorization.

222251206643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9663095964.

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 222251206643 its reverse (346602152222), we get a palindrome (568853358865).

The spelling of 222251206643 in words is "two hundred twenty-two billion, two hundred fifty-one million, two hundred six thousand, six hundred forty-three".