19225849 has 2 divisors, whose sum is σ = 19225850. Its totient is φ = 19225848.

The previous prime is 19225841. The next prime is 19225873. The reversal of 19225849 is 94852291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18215824 + 1010025 = 4268^2 + 1005^2 .

It is an emirp because it is prime and its reverse (94852291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19225849 - 2³ = 19225841 is a prime.

It is not a weakly prime, because it can be changed into another prime (19225841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9612924 + 9612925.

It is an arithmetic number, because the mean of its divisors is an integer number (9612925).

Almost surely, 2^19225849 is an apocalyptic number.

It is an amenable number.

19225849 is a deficient number, since it is larger than the sum of its proper divisors (1).

19225849 is an equidigital number, since it uses as much as digits as its factorization.

19225849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 19225849 is about 4384.7290680269. The cubic root of 19225849 is about 267.8932940091.

The spelling of 19225849 in words is "nineteen million, two hundred twenty-five thousand, eight hundred forty-nine".