71224907 has 4 divisors (see below), whose sum is σ = 76703760. Its totient is φ = 65746056.

The previous prime is 71224843. The next prime is 71224927. The reversal of 71224907 is 70942217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70942217 = 43 ⋅1649819.

It is a cyclic number.

It is not a de Polignac number, because 71224907 - 2⁶ = 71224843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71224927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2739407 + ... + 2739432.

It is an arithmetic number, because the mean of its divisors is an integer number (19175940).

Almost surely, 2^71224907 is an apocalyptic number.

71224907 is a deficient number, since it is larger than the sum of its proper divisors (5478853).

71224907 is a wasteful number, since it uses less digits than its factorization.

71224907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478852.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 71224907 is about 8439.4849961357. The cubic root of 71224907 is about 414.5185436111.

The spelling of 71224907 in words is "seventy-one million, two hundred twenty-four thousand, nine hundred seven".