19242229 has 2 divisors, whose sum is σ = 19242230. Its totient is φ = 19242228.

The previous prime is 19242203. The next prime is 19242263. The reversal of 19242229 is 92224291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19158129 + 84100 = 4377^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 19242229 - 2⁷ = 19242101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19242229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19242299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9621114 + 9621115.

It is an arithmetic number, because the mean of its divisors is an integer number (9621115).

Almost surely, 2^19242229 is an apocalyptic number.

It is an amenable number.

19242229 is a deficient number, since it is larger than the sum of its proper divisors (1).

19242229 is an equidigital number, since it uses as much as digits as its factorization.

19242229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 19242229 is about 4386.5965166630. The cubic root of 19242229 is about 267.9693521425.

The spelling of 19242229 in words is "nineteen million, two hundred forty-two thousand, two hundred twenty-nine".