22156447349 has 2 divisors, whose sum is σ = 22156447350. Its totient is φ = 22156447348.

The previous prime is 22156447303. The next prime is 22156447451. The reversal of 22156447349 is 94374465122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16044022225 + 6112425124 = 126665^2 + 78182^2 .

It is a cyclic number.

It is not a de Polignac number, because 22156447349 - 2³² = 17861480053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22156440349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11078223674 + 11078223675.

It is an arithmetic number, because the mean of its divisors is an integer number (11078223675).

Almost surely, 2^22156447349 is an apocalyptic number.

It is an amenable number.

22156447349 is a deficient number, since it is larger than the sum of its proper divisors (1).

22156447349 is an equidigital number, since it uses as much as digits as its factorization.

22156447349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 47.

The spelling of 22156447349 in words is "twenty-two billion, one hundred fifty-six million, four hundred forty-seven thousand, three hundred forty-nine".