68203213 has 12 divisors (see below), whose sum is σ = 75308884. Its totient is φ = 61401600.

The previous prime is 68203207. The next prime is 68203229. The reversal of 68203213 is 31230286.

It can be written as a sum of positive squares in 6 ways, for example, as 56280004 + 11923209 = 7502^2 + 3453^2 .

It is a de Polignac number, because none of the positive numbers 2^k-68203213 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 (68203313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20293 + ... + 23413.

Almost surely, 2^68203213 is an apocalyptic number.

It is an amenable number.

68203213 is a deficient number, since it is larger than the sum of its proper divisors (7105671).

68203213 is a wasteful number, since it uses less digits than its factorization.

68203213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216 (or 3175 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 68203213 is about 8258.5236574100. The cubic root of 68203213 is about 408.5716967122.

Adding to 68203213 its reverse (31230286), we get a palindrome (99433499).

The spelling of 68203213 in words is "sixty-eight million, two hundred three thousand, two hundred thirteen".