71045531 has 2 divisors, whose sum is σ = 71045532. Its totient is φ = 71045530.

The previous prime is 71045519. The next prime is 71045543. The reversal of 71045531 is 13554017.

It is a balanced prime because it is at equal distance from previous prime (71045519) and next prime (71045543).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71045531 is a prime.

It is a super-2 number, since 2×71045531² = 10094934950143922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71045531.

It is not a weakly prime, because it can be changed into another prime (71045501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35522765 + 35522766.

It is an arithmetic number, because the mean of its divisors is an integer number (35522766).

Almost surely, 2^71045531 is an apocalyptic number.

71045531 is a deficient number, since it is larger than the sum of its proper divisors (1).

71045531 is an equidigital number, since it uses as much as digits as its factorization.

71045531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 71045531 is about 8428.8511079506. The cubic root of 71045531 is about 414.1702703816.

Adding to 71045531 its reverse (13554017), we get a palindrome (84599548).

The spelling of 71045531 in words is "seventy-one million, forty-five thousand, five hundred thirty-one".