22398777971 has 2 divisors, whose sum is σ = 22398777972. Its totient is φ = 22398777970.

The previous prime is 22398777899. The next prime is 22398777991. The reversal of 22398777971 is 17977789322.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22398777971 - 2¹⁰ = 22398776947 is a prime.

It is not a weakly prime, because it can be changed into another prime (22398777991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11199388985 + 11199388986.

It is an arithmetic number, because the mean of its divisors is an integer number (11199388986).

Almost surely, 2^22398777971 is an apocalyptic number.

22398777971 is a deficient number, since it is larger than the sum of its proper divisors (1).

22398777971 is an equidigital number, since it uses as much as digits as its factorization.

22398777971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18670176, while the sum is 62.

The spelling of 22398777971 in words is "twenty-two billion, three hundred ninety-eight million, seven hundred seventy-seven thousand, nine hundred seventy-one".