71455813 has 8 divisors (see below), whose sum is σ = 83948256. Its totient is φ = 59962800.

The previous prime is 71455807. The next prime is 71455817. The reversal of 71455813 is 31855417.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71455813 is a prime.

It is a super-2 number, since 2×71455813² = 10211866422981938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71455817) 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, 249703 + ... + 249988.

It is an arithmetic number, because the mean of its divisors is an integer number (10493532).

Almost surely, 2^71455813 is an apocalyptic number.

It is an amenable number.

71455813 is a deficient number, since it is larger than the sum of its proper divisors (12492443).

71455813 is a wasteful number, since it uses less digits than its factorization.

71455813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499715.

The product of its digits is 16800, while the sum is 34.

The square root of 71455813 is about 8453.1540267524. The cubic root of 71455813 is about 414.9660067961.

The spelling of 71455813 in words is "seventy-one million, four hundred fifty-five thousand, eight hundred thirteen".