72211707 has 6 divisors (see below), whose sum is σ = 104305812. Its totient is φ = 48141132.

The previous prime is 72211639. The next prime is 72211709. The reversal of 72211707 is 70711227.

It is a de Polignac number, because none of the positive numbers 2^k-72211707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72211709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4011753 + ... + 4011770.

It is an arithmetic number, because the mean of its divisors is an integer number (17384302).

Almost surely, 2^72211707 is an apocalyptic number.

72211707 is a deficient number, since it is larger than the sum of its proper divisors (32094105).

72211707 is a wasteful number, since it uses less digits than its factorization.

72211707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8023529 (or 8023526 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 27.

The square root of 72211707 is about 8497.7471720451. The cubic root of 72211707 is about 416.4241140489.

The spelling of 72211707 in words is "seventy-two million, two hundred eleven thousand, seven hundred seven".