2221954679 has 4 divisors (see below), whose sum is σ = 2539376784. Its totient is φ = 1904532576.

The previous prime is 2221954663. The next prime is 2221954703. The reversal of 2221954679 is 9764591222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9764591222 = 2 ⋅4882295611.

It is a cyclic number.

It is not a de Polignac number, because 2221954679 - 2⁴ = 2221954663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221954619) 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, 158711042 + ... + 158711055.

It is an arithmetic number, because the mean of its divisors is an integer number (634844196).

Almost surely, 2^2221954679 is an apocalyptic number.

2221954679 is a deficient number, since it is larger than the sum of its proper divisors (317422105).

2221954679 is an equidigital number, since it uses as much as digits as its factorization.

2221954679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317422104.

The product of its digits is 544320, while the sum is 47.

The square root of 2221954679 is about 47137.6142692861. The cubic root of 2221954679 is about 1304.9035084726.

The spelling of 2221954679 in words is "two billion, two hundred twenty-one million, nine hundred fifty-four thousand, six hundred seventy-nine".