72221416 has 16 divisors (see below), whose sum is σ = 135599040. Its totient is φ = 36061680.

The previous prime is 72221399. The next prime is 72221419. The reversal of 72221416 is 61412227.

It is not an unprimeable number, because it can be changed into a prime (72221419) 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, 561 + ... + 12031.

It is an arithmetic number, because the mean of its divisors is an integer number (8474940).

Almost surely, 2^72221416 is an apocalyptic number.

It is an amenable number.

72221416 is a deficient number, since it is larger than the sum of its proper divisors (63377624).

72221416 is a wasteful number, since it uses less digits than its factorization.

72221416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12264 (or 12260 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 72221416 is about 8498.3184218997. The cubic root of 72221416 is about 416.4427762147.

The spelling of 72221416 in words is "seventy-two million, two hundred twenty-one thousand, four hundred sixteen".