2221963397 has 2 divisors, whose sum is σ = 2221963398. Its totient is φ = 2221963396.

The previous prime is 2221963363. The next prime is 2221963433. The reversal of 2221963397 is 7933691222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1345862596 + 876100801 = 36686^2 + 29599^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221963397 - 2⁶ = 2221963333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221963357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110981698 + 1110981699.

It is an arithmetic number, because the mean of its divisors is an integer number (1110981699).

Almost surely, 2^2221963397 is an apocalyptic number.

It is an amenable number.

2221963397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221963397 is an equidigital number, since it uses as much as digits as its factorization.

2221963397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 2221963397 is about 47137.7067431160. The cubic root of 2221963397 is about 1304.9052150982.

The spelling of 2221963397 in words is "two billion, two hundred twenty-one million, nine hundred sixty-three thousand, three hundred ninety-seven".