71501447 has 2 divisors, whose sum is σ = 71501448. Its totient is φ = 71501446.

The previous prime is 71501413. The next prime is 71501449. The reversal of 71501447 is 74410517.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71501447 - 2¹⁰ = 71500423 is a prime.

It is a super-2 number, since 2×71501447² = 10224913846187618, which contains 22 as substring.

Together with 71501449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71501449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35750723 + 35750724.

It is an arithmetic number, because the mean of its divisors is an integer number (35750724).

Almost surely, 2^71501447 is an apocalyptic number.

71501447 is a deficient number, since it is larger than the sum of its proper divisors (1).

71501447 is an equidigital number, since it uses as much as digits as its factorization.

71501447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 71501447 is about 8455.8528251147. The cubic root of 71501447 is about 415.0543249153.

The spelling of 71501447 in words is "seventy-one million, five hundred one thousand, four hundred forty-seven".