71865223 has 8 divisors (see below), whose sum is σ = 74280960. Its totient is φ = 69455640.

The previous prime is 71865203. The next prime is 71865247. The reversal of 71865223 is 32256817.

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 not a de Polignac number, because 71865223 - 2²⁵ = 38310791 is a prime.

It is a super-2 number, since 2×71865223² = 10329220553679458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71865203) 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, 45318 + ... + 46876.

It is an arithmetic number, because the mean of its divisors is an integer number (9285120).

Almost surely, 2^71865223 is an apocalyptic number.

71865223 is a deficient number, since it is larger than the sum of its proper divisors (2415737).

71865223 is a wasteful number, since it uses less digits than its factorization.

71865223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077.

The product of its digits is 20160, while the sum is 34.

The square root of 71865223 is about 8477.3358432942. The cubic root of 71865223 is about 415.7570214925.

The spelling of 71865223 in words is "seventy-one million, eight hundred sixty-five thousand, two hundred twenty-three".