71527831 has 2 divisors, whose sum is σ = 71527832. Its totient is φ = 71527830.

The previous prime is 71527829. The next prime is 71527849. The reversal of 71527831 is 13872517.

It is a weak prime.

It is an emirp because it is prime and its reverse (13872517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71527831 - 2¹ = 71527829 is a prime.

It is a super-2 number, since 2×71527831² = 10232461215129122, which contains 22 as substring.

Together with 71527829, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71527811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35763915 + 35763916.

It is an arithmetic number, because the mean of its divisors is an integer number (35763916).

Almost surely, 2^71527831 is an apocalyptic number.

71527831 is a deficient number, since it is larger than the sum of its proper divisors (1).

71527831 is an equidigital number, since it uses as much as digits as its factorization.

71527831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 34.

The square root of 71527831 is about 8457.4127840611. The cubic root of 71527831 is about 415.1053702535.

The spelling of 71527831 in words is "seventy-one million, five hundred twenty-seven thousand, eight hundred thirty-one".