71631211 has 2 divisors, whose sum is σ = 71631212. Its totient is φ = 71631210.

The previous prime is 71631199. The next prime is 71631227. The reversal of 71631211 is 11213617.

It is a weak prime.

It is an emirp because it is prime and its reverse (11213617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71631211 - 2⁵ = 71631179 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71631271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35815605 + 35815606.

It is an arithmetic number, because the mean of its divisors is an integer number (35815606).

Almost surely, 2^71631211 is an apocalyptic number.

71631211 is a deficient number, since it is larger than the sum of its proper divisors (1).

71631211 is an equidigital number, since it uses as much as digits as its factorization.

71631211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 22.

The square root of 71631211 is about 8463.5223754652. The cubic root of 71631211 is about 415.3052595118.

Adding to 71631211 its reverse (11213617), we get a palindrome (82844828).

The spelling of 71631211 in words is "seventy-one million, six hundred thirty-one thousand, two hundred eleven".