19317213 has 6 divisors (see below), whose sum is σ = 27902654. Its totient is φ = 12878136.

The previous prime is 19317203. The next prime is 19317227. The reversal of 19317213 is 31271391.

It can be written as a sum of positive squares in only one way, i.e., 18429849 + 887364 = 4293^2 + 942^2 .

It is not a de Polignac number, because 19317213 - 2¹² = 19313117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19317203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1073170 + ... + 1073187.

Almost surely, 2^19317213 is an apocalyptic number.

It is an amenable number.

19317213 is a deficient number, since it is larger than the sum of its proper divisors (8585441).

19317213 is a wasteful number, since it uses less digits than its factorization.

19317213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146363 (or 2146360 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 19317213 is about 4395.1351515056. The cubic root of 19317213 is about 268.3169794010.

The spelling of 19317213 in words is "nineteen million, three hundred seventeen thousand, two hundred thirteen".