71015830 has 16 divisors (see below), whose sum is σ = 127924560. Its totient is φ = 28384992.

The previous prime is 71015807. The next prime is 71015831. The reversal of 71015830 is 3851017.

It is a super-2 number, since 2×71015830² = 10086496221177800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71015795 and 71015804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71015831) 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, 23992 + ... + 26788.

It is an arithmetic number, because the mean of its divisors is an integer number (7995285).

Almost surely, 2^71015830 is an apocalyptic number.

71015830 is a deficient number, since it is larger than the sum of its proper divisors (56908730).

71015830 is a wasteful number, since it uses less digits than its factorization.

71015830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5343.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 71015830 is about 8427.0890585065. The cubic root of 71015830 is about 414.1125469019.

Adding to 71015830 its reverse (3851017), we get a palindrome (74866847).

The spelling of 71015830 in words is "seventy-one million, fifteen thousand, eight hundred thirty".