71131272 has 32 divisors (see below), whose sum is σ = 185561280. Its totient is φ = 22679360.

The previous prime is 71131271. The next prime is 71131283. The reversal of 71131272 is 27213117.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (71131271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63879 + ... + 64982.

It is an arithmetic number, because the mean of its divisors is an integer number (5798790).

Almost surely, 2^71131272 is an apocalyptic number.

It is an amenable number.

71131272 is an abundant number, since it is smaller than the sum of its proper divisors (114430008).

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

71131272 is a wasteful number, since it uses less digits than its factorization.

71131272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128893 (or 128889 counting only the distinct ones).

The product of its digits is 588, while the sum is 24.

The square root of 71131272 is about 8433.9357360606. The cubic root of 71131272 is about 414.3368166168.

Adding to 71131272 its reverse (27213117), we get a palindrome (98344389).

It can be divided in two parts, 7113 and 1272, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 71131272 in words is "seventy-one million, one hundred thirty-one thousand, two hundred seventy-two".