71023881 has 8 divisors (see below), whose sum is σ = 99682720. Its totient is φ = 44857152.

The previous prime is 71023879. The next prime is 71023891. The reversal of 71023881 is 18832017.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71023881 - 2¹ = 71023879 is a prime.

It is a super-2 number, since 2×71023881² = 10088783344604322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71023891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622960 + ... + 623073.

It is an arithmetic number, because the mean of its divisors is an integer number (12460340).

Almost surely, 2^71023881 is an apocalyptic number.

It is an amenable number.

71023881 is a deficient number, since it is larger than the sum of its proper divisors (28658839).

71023881 is a wasteful number, since it uses less digits than its factorization.

71023881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246055.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 71023881 is about 8427.5667306762. The cubic root of 71023881 is about 414.1281954981.

Adding to 71023881 its reverse (18832017), we get a palindrome (89855898).

The spelling of 71023881 in words is "seventy-one million, twenty-three thousand, eight hundred eighty-one".