71331361 has 2 divisors, whose sum is σ = 71331362. Its totient is φ = 71331360.

The previous prime is 71331331. The next prime is 71331373. The reversal of 71331361 is 16313317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53012961 + 18318400 = 7281^2 + 4280^2 .

It is a cyclic number.

It is not a de Polignac number, because 71331361 - 2⁹ = 71330849 is a prime.

It is a super-2 number, since 2×71331361² = 10176326124224642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71331331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35665680 + 35665681.

It is an arithmetic number, because the mean of its divisors is an integer number (35665681).

Almost surely, 2^71331361 is an apocalyptic number.

It is an amenable number.

71331361 is a deficient number, since it is larger than the sum of its proper divisors (1).

71331361 is an equidigital number, since it uses as much as digits as its factorization.

71331361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 25.

The square root of 71331361 is about 8445.7895427248. The cubic root of 71331361 is about 414.7249563803.

Adding to 71331361 its reverse (16313317), we get a palindrome (87644678).

The spelling of 71331361 in words is "seventy-one million, three hundred thirty-one thousand, three hundred sixty-one".