1922442257 has 2 divisors, whose sum is σ = 1922442258. Its totient is φ = 1922442256.

The previous prime is 1922442227. The next prime is 1922442271. The reversal of 1922442257 is 7522442291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1911525841 + 10916416 = 43721^2 + 3304^2 .

It is a cyclic number.

It is not a de Polignac number, because 1922442257 - 2⁸ = 1922442001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1922442257.

It is not a weakly prime, because it can be changed into another prime (1922442227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961221128 + 961221129.

It is an arithmetic number, because the mean of its divisors is an integer number (961221129).

Almost surely, 2^1922442257 is an apocalyptic number.

It is an amenable number.

1922442257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1922442257 is an equidigital number, since it uses as much as digits as its factorization.

1922442257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 1922442257 is about 43845.6640615694. The cubic root of 1922442257 is about 1243.4197693951.

The spelling of 1922442257 in words is "one billion, nine hundred twenty-two million, four hundred forty-two thousand, two hundred fifty-seven".