71510012 has 24 divisors (see below), whose sum is σ = 145941600. Its totient is φ = 30646560.

The previous prime is 71510009. The next prime is 71510029. The reversal of 71510012 is 21001517.

It is a super-2 number, since 2×71510012² = 10227363632480288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24689 + ... + 27432.

It is an arithmetic number, because the mean of its divisors is an integer number (6080900).

Almost surely, 2^71510012 is an apocalyptic number.

It is an amenable number.

71510012 is an abundant number, since it is smaller than the sum of its proper divisors (74431588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71510012 is a wasteful number, since it uses less digits than its factorization.

71510012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52146 (or 52130 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 71510012 is about 8456.3592638913. The cubic root of 71510012 is about 415.0708970664.

Adding to 71510012 its reverse (21001517), we get a palindrome (92511529).

The spelling of 71510012 in words is "seventy-one million, five hundred ten thousand, twelve".