71229811 has 2 divisors, whose sum is σ = 71229812. Its totient is φ = 71229810.

The previous prime is 71229791. The next prime is 71229817. The reversal of 71229811 is 11892217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71229811 - 2¹⁵ = 71197043 is a prime.

It is not a weakly prime, because it can be changed into another prime (71229817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35614905 + 35614906.

It is an arithmetic number, because the mean of its divisors is an integer number (35614906).

Almost surely, 2^71229811 is an apocalyptic number.

71229811 is a deficient number, since it is larger than the sum of its proper divisors (1).

71229811 is an equidigital number, since it uses as much as digits as its factorization.

71229811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 31.

The square root of 71229811 is about 8439.7755301904. The cubic root of 71229811 is about 414.5280569138.

The spelling of 71229811 in words is "seventy-one million, two hundred twenty-nine thousand, eight hundred eleven".