71532031 has 2 divisors, whose sum is σ = 71532032. Its totient is φ = 71532030.

The previous prime is 71532029. The next prime is 71532049. The reversal of 71532031 is 13023517.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71532031 - 2¹ = 71532029 is a prime.

It is a super-2 number, since 2×71532031² = 10233662917969922, which contains 22 as substring.

Together with 71532029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 71531993 and 71532011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71532011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35766015 + 35766016.

It is an arithmetic number, because the mean of its divisors is an integer number (35766016).

Almost surely, 2^71532031 is an apocalyptic number.

71532031 is a deficient number, since it is larger than the sum of its proper divisors (1).

71532031 is an equidigital number, since it uses as much as digits as its factorization.

71532031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 71532031 is about 8457.6610833019. The cubic root of 71532031 is about 415.1134948693.

Adding to 71532031 its reverse (13023517), we get a palindrome (84555548).

The spelling of 71532031 in words is "seventy-one million, five hundred thirty-two thousand, thirty-one".