71231272 has 16 divisors (see below), whose sum is σ = 152638560. Its totient is φ = 30527664.

The previous prime is 71231267. The next prime is 71231287. The reversal of 71231272 is 27213217.

It is a super-2 number, since 2×71231272² = 10147788221475968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635938 + ... + 636049.

It is an arithmetic number, because the mean of its divisors is an integer number (9539910).

Almost surely, 2^71231272 is an apocalyptic number.

It is an amenable number.

71231272 is an abundant number, since it is smaller than the sum of its proper divisors (81407288).

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

71231272 is a wasteful number, since it uses less digits than its factorization.

71231272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272000 (or 1271996 counting only the distinct ones).

The product of its digits is 1176, while the sum is 25.

The square root of 71231272 is about 8439.8620841812. The cubic root of 71231272 is about 414.5308910331.

Adding to 71231272 its reverse (27213217), we get a palindrome (98444489).

The spelling of 71231272 in words is "seventy-one million, two hundred thirty-one thousand, two hundred seventy-two".