71415681 has 8 divisors (see below), whose sum is σ = 96525600. Its totient is φ = 46958112.

The previous prime is 71415677. The next prime is 71415683. The reversal of 71415681 is 18651417.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71415681 - 2² = 71415677 is a prime.

It is a super-2 number, since 2×71415681² = 10200398985387522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71415683) by changing a digit.

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, 162831 + ... + 163268.

It is an arithmetic number, because the mean of its divisors is an integer number (12065700).

Almost surely, 2^71415681 is an apocalyptic number.

It is an amenable number.

71415681 is a deficient number, since it is larger than the sum of its proper divisors (25109919).

71415681 is a wasteful number, since it uses less digits than its factorization.

71415681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326175.

The product of its digits is 6720, while the sum is 33.

The square root of 71415681 is about 8450.7799048372. The cubic root of 71415681 is about 414.8883059357. Note that the first 3 decimals are identical.

The spelling of 71415681 in words is "seventy-one million, four hundred fifteen thousand, six hundred eighty-one".