71310312 has 48 divisors (see below), whose sum is σ = 193604580. Its totient is φ = 23712000.

The previous prime is 71310301. The next prime is 71310319. The reversal of 71310312 is 21301317.

It can be written as a sum of positive squares in 2 ways, for example, as 62631396 + 8678916 = 7914^2 + 2946^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (71310319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36562 + ... + 38462.

Almost surely, 2^71310312 is an apocalyptic number.

71310312 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

71310312 is an abundant number, since it is smaller than the sum of its proper divisors (122294268).

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

71310312 is a wasteful number, since it uses less digits than its factorization.

71310312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434 (or 2427 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 71310312 is about 8444.5433269064. The cubic root of 71310312 is about 414.6841589700.

Adding to 71310312 its reverse (21301317), we get a palindrome (92611629).

It can be divided in two parts, 713 and 10312, that added together give a square (11025 = 105²).

The spelling of 71310312 in words is "seventy-one million, three hundred ten thousand, three hundred twelve".