71662271231 has 2 divisors, whose sum is σ = 71662271232. Its totient is φ = 71662271230.

The previous prime is 71662271207. The next prime is 71662271269. The reversal of 71662271231 is 13217226617.

It is an a-pointer prime, because the next prime (71662271269) can be obtained adding 71662271231 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71662271231 is a prime.

It is a super-2 number, since 2×71662271231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71662271531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35831135615 + 35831135616.

It is an arithmetic number, because the mean of its divisors is an integer number (35831135616).

Almost surely, 2^71662271231 is an apocalyptic number.

71662271231 is a deficient number, since it is larger than the sum of its proper divisors (1).

71662271231 is an equidigital number, since it uses as much as digits as its factorization.

71662271231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

Adding to 71662271231 its reverse (13217226617), we get a palindrome (84879497848).

The spelling of 71662271231 in words is "seventy-one billion, six hundred sixty-two million, two hundred seventy-one thousand, two hundred thirty-one".