71513712 has 40 divisors (see below), whose sum is σ = 205272080. Its totient is φ = 23837760.

The previous prime is 71513707. The next prime is 71513731. The reversal of 71513712 is 21731517.

It is a happy number.

It is a super-2 number, since 2×71513712² = 10228422008037888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82339 + ... + 83202.

It is an arithmetic number, because the mean of its divisors is an integer number (5131802).

Almost surely, 2^71513712 is an apocalyptic number.

71513712 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

71513712 is an abundant number, since it is smaller than the sum of its proper divisors (133758368).

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

71513712 is a wasteful number, since it uses less digits than its factorization.

71513712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165558 (or 165546 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 71513712 is about 8456.5780313316. The cubic root of 71513712 is about 415.0780556716.

The spelling of 71513712 in words is "seventy-one million, five hundred thirteen thousand, seven hundred twelve".