71631233 has 2 divisors, whose sum is σ = 71631234. Its totient is φ = 71631232.

The previous prime is 71631227. The next prime is 71631239. The reversal of 71631233 is 33213617.

It is a balanced prime because it is at equal distance from previous prime (71631227) and next prime (71631239).

It can be written as a sum of positive squares in only one way, i.e., 50027329 + 21603904 = 7073^2 + 4648^2 .

It is a cyclic number.

It is not a de Polignac number, because 71631233 - 2²⁶ = 4522369 is a prime.

It is a super-2 number, since 2×71631233² = 10262067082200578, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (71631239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35815616 + 35815617.

It is an arithmetic number, because the mean of its divisors is an integer number (35815617).

Almost surely, 2^71631233 is an apocalyptic number.

It is an amenable number.

71631233 is a deficient number, since it is larger than the sum of its proper divisors (1).

71631233 is an equidigital number, since it uses as much as digits as its factorization.

71631233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 26.

The square root of 71631233 is about 8463.5236751604. The cubic root of 71631233 is about 415.3053020292.

The spelling of 71631233 in words is "seventy-one million, six hundred thirty-one thousand, two hundred thirty-three".