71150013 has 24 divisors (see below), whose sum is σ = 112528416. Its totient is φ = 42962400.

The previous prime is 71149999. The next prime is 71150059. The reversal of 71150013 is 31005117.

It is a happy number.

It is not a de Polignac number, because 71150013 - 2²² = 66955709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71150413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29223 + ... + 31563.

It is an arithmetic number, because the mean of its divisors is an integer number (4688684).

Almost surely, 2^71150013 is an apocalyptic number.

It is an amenable number.

71150013 is a deficient number, since it is larger than the sum of its proper divisors (41378403).

71150013 is a wasteful number, since it uses less digits than its factorization.

71150013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665 (or 2662 counting only the distinct ones).

The product of its (nonzero) digits is 105, while the sum is 18.

The square root of 71150013 is about 8435.0467100070. The cubic root of 71150013 is about 414.3732019468.

Subtracting from 71150013 its reverse (31005117), we obtain a square (40144896 = 6336²).

The spelling of 71150013 in words is "seventy-one million, one hundred fifty thousand, thirteen".