221522000279 has 2 divisors, whose sum is σ = 221522000280. Its totient is φ = 221522000278.

The previous prime is 221522000269. The next prime is 221522000309. The reversal of 221522000279 is 972000225122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221522000279 - 2⁴ = 221522000263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221522000269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110761000139 + 110761000140.

It is an arithmetic number, because the mean of its divisors is an integer number (110761000140).

Almost surely, 2^221522000279 is an apocalyptic number.

221522000279 is a deficient number, since it is larger than the sum of its proper divisors (1).

221522000279 is an equidigital number, since it uses as much as digits as its factorization.

221522000279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 221522000279 in words is "two hundred twenty-one billion, five hundred twenty-two million, two hundred seventy-nine", and thus it is an aban number.