71512112 has 20 divisors (see below), whose sum is σ = 158348496. Its totient is φ = 30648000.

The previous prime is 71512093. The next prime is 71512117. The reversal of 71512112 is 21121517.

It is a happy number.

It is a super-2 number, since 2×71512112² = 10227964325401088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71512117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319139 + ... + 319362.

Almost surely, 2^71512112 is an apocalyptic number.

It is an amenable number.

71512112 is an abundant number, since it is smaller than the sum of its proper divisors (86836384).

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

71512112 is a wasteful number, since it uses less digits than its factorization.

71512112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638516 (or 638510 counting only the distinct ones).

The product of its digits is 140, while the sum is 20.

The square root of 71512112 is about 8456.4834298898. The cubic root of 71512112 is about 415.0749600888.

Adding to 71512112 its reverse (21121517), we get a palindrome (92633629).

The spelling of 71512112 in words is "seventy-one million, five hundred twelve thousand, one hundred twelve".