71001563 has 6 divisors (see below), whose sum is σ = 73366812. Its totient is φ = 68710260.

The previous prime is 71001547. The next prime is 71001569. The reversal of 71001563 is 36510017.

It is not a de Polignac number, because 71001563 - 2⁴ = 71001547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71001569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35981 + ... + 37902.

It is an arithmetic number, because the mean of its divisors is an integer number (12227802).

Almost surely, 2^71001563 is an apocalyptic number.

71001563 is a deficient number, since it is larger than the sum of its proper divisors (2365249).

71001563 is an equidigital number, since it uses as much as digits as its factorization.

71001563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73945 (or 73914 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 71001563 is about 8426.2425196525. The cubic root of 71001563 is about 414.0848134637.

The spelling of 71001563 in words is "seventy-one million, one thousand, five hundred sixty-three".