71735231 has 2 divisors, whose sum is σ = 71735232. Its totient is φ = 71735230.

The previous prime is 71735227. The next prime is 71735233. The reversal of 71735231 is 13253717.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71735231 - 2² = 71735227 is a prime.

It is a super-2 number, since 2×71735231² = 10291886733246722, which contains 22 as substring.

Together with 71735233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71735194 and 71735203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71735233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35867615 + 35867616.

It is an arithmetic number, because the mean of its divisors is an integer number (35867616).

Almost surely, 2^71735231 is an apocalyptic number.

71735231 is a deficient number, since it is larger than the sum of its proper divisors (1).

71735231 is an equidigital number, since it uses as much as digits as its factorization.

71735231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4410, while the sum is 29.

The square root of 71735231 is about 8469.6653416767. The cubic root of 71735231 is about 415.5061922161.

Adding to 71735231 its reverse (13253717), we get a palindrome (84988948).

The spelling of 71735231 in words is "seventy-one million, seven hundred thirty-five thousand, two hundred thirty-one".