71512156 has 12 divisors (see below), whose sum is σ = 125208720. Its totient is φ = 35738240.

The previous prime is 71512153. The next prime is 71512169. The reversal of 71512156 is 65121517.

It is a super-2 number, since 2×71512156² = 10227976911536672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71512153) 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, 9225 + ... + 15103.

It is an arithmetic number, because the mean of its divisors is an integer number (10434060).

Almost surely, 2^71512156 is an apocalyptic number.

It is an amenable number.

71512156 is a deficient number, since it is larger than the sum of its proper divisors (53696564).

71512156 is a wasteful number, since it uses less digits than its factorization.

71512156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8924 (or 8922 counting only the distinct ones).

The product of its digits is 2100, while the sum is 28.

The square root of 71512156 is about 8456.4860314436. The cubic root of 71512156 is about 415.0750452180.

The spelling of 71512156 in words is "seventy-one million, five hundred twelve thousand, one hundred fifty-six".