71224909 has 8 divisors (see below), whose sum is σ = 81664128. Its totient is φ = 60851760.

The previous prime is 71224843. The next prime is 71224927. The reversal of 71224909 is 90942217.

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-71224909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71224009) 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, 14182 + ... + 18535.

It is an arithmetic number, because the mean of its divisors is an integer number (10208016).

Almost surely, 2^71224909 is an apocalyptic number.

It is an amenable number.

71224909 is a deficient number, since it is larger than the sum of its proper divisors (10439219).

71224909 is a wasteful number, since it uses less digits than its factorization.

71224909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33035.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 71224909 is about 8439.4851146264. The cubic root of 71224909 is about 414.5185474910.

The spelling of 71224909 in words is "seventy-one million, two hundred twenty-four thousand, nine hundred nine".