72226517 has 16 divisors (see below), whose sum is σ = 80317440. Its totient is φ = 64402800.

The previous prime is 72226513. The next prime is 72226529. The reversal of 72226517 is 71562227.

It is not a de Polignac number, because 72226517 - 2² = 72226513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72226513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218042 + ... + 218372.

It is an arithmetic number, because the mean of its divisors is an integer number (5019840).

Almost surely, 2^72226517 is an apocalyptic number.

It is an amenable number.

72226517 is a deficient number, since it is larger than the sum of its proper divisors (8090923).

72226517 is a wasteful number, since it uses less digits than its factorization.

72226517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its digits is 11760, while the sum is 32.

The square root of 72226517 is about 8498.6185347973. The cubic root of 72226517 is about 416.4525804376.

The spelling of 72226517 in words is "seventy-two million, two hundred twenty-six thousand, five hundred seventeen".