19042213 has 2 divisors, whose sum is σ = 19042214. Its totient is φ = 19042212.

The previous prime is 19042207. The next prime is 19042223. The reversal of 19042213 is 31224091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15737089 + 3305124 = 3967^2 + 1818^2 .

It is an emirp because it is prime and its reverse (31224091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19042213 - 2⁵ = 19042181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19042223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9521106 + 9521107.

It is an arithmetic number, because the mean of its divisors is an integer number (9521107).

Almost surely, 2^19042213 is an apocalyptic number.

It is an amenable number.

19042213 is a deficient number, since it is larger than the sum of its proper divisors (1).

19042213 is an equidigital number, since it uses as much as digits as its factorization.

19042213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 19042213 is about 4363.7384202081. The cubic root of 19042213 is about 267.0376349106.

The spelling of 19042213 in words is "nineteen million, forty-two thousand, two hundred thirteen".