71312152 has 16 divisors (see below), whose sum is σ = 138024000. Its totient is φ = 34505760.

The previous prime is 71312147. The next prime is 71312159. The reversal of 71312152 is 25121317.

It is a happy number.

It is a super-2 number, since 2×71312152² = 10170846045742208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71312159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143527 + ... + 144022.

It is an arithmetic number, because the mean of its divisors is an integer number (8626500).

Almost surely, 2^71312152 is an apocalyptic number.

It is an amenable number.

71312152 is a deficient number, since it is larger than the sum of its proper divisors (66711848).

71312152 is a wasteful number, since it uses less digits than its factorization.

71312152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287586 (or 287582 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 71312152 is about 8444.6522722964. The cubic root of 71312152 is about 414.6877255991.

Adding to 71312152 its reverse (25121317), we get a palindrome (96433469).

The spelling of 71312152 in words is "seventy-one million, three hundred twelve thousand, one hundred fifty-two".