22051979 has 2 divisors, whose sum is σ = 22051980. Its totient is φ = 22051978.

The previous prime is 22051957. The next prime is 22051993. The reversal of 22051979 is 97915022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22051979 is a prime.

It is not a weakly prime, because it can be changed into another prime (22051949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11025989 + 11025990.

It is an arithmetic number, because the mean of its divisors is an integer number (11025990).

Almost surely, 2^22051979 is an apocalyptic number.

22051979 is a deficient number, since it is larger than the sum of its proper divisors (1).

22051979 is an equidigital number, since it uses as much as digits as its factorization.

22051979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 22051979 is about 4695.9534708087. The cubic root of 22051979 is about 280.4244370757.

The spelling of 22051979 in words is "twenty-two million, fifty-one thousand, nine hundred seventy-nine".