71204213 has 2 divisors, whose sum is σ = 71204214. Its totient is φ = 71204212.

The previous prime is 71204197. The next prime is 71204233. The reversal of 71204213 is 31240217.

It is an a-pointer prime, because the next prime (71204233) can be obtained adding 71204213 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55696369 + 15507844 = 7463^2 + 3938^2 .

It is a cyclic number.

It is not a de Polignac number, because 71204213 - 2⁴ = 71204197 is a prime.

It is a super-3 number, since 3×71204213³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71204233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35602106 + 35602107.

It is an arithmetic number, because the mean of its divisors is an integer number (35602107).

Almost surely, 2^71204213 is an apocalyptic number.

It is an amenable number.

71204213 is a deficient number, since it is larger than the sum of its proper divisors (1).

71204213 is an equidigital number, since it uses as much as digits as its factorization.

71204213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 71204213 is about 8438.2588843908. The cubic root of 71204213 is about 414.4783943712.

It can be divided in two parts, 71204 and 213, that added together give a palindrome (71417).

The spelling of 71204213 in words is "seventy-one million, two hundred four thousand, two hundred thirteen".