72219247 has 8 divisors (see below), whose sum is σ = 80492400. Its totient is φ = 64393344.

The previous prime is 72219239. The next prime is 72219271. The reversal of 72219247 is 74291227.

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 not a de Polignac number, because 72219247 - 2³ = 72219239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72210247) 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 7 ways as a sum of consecutive naturals, for example, 111472 + ... + 112117.

It is an arithmetic number, because the mean of its divisors is an integer number (10061550).

Almost surely, 2^72219247 is an apocalyptic number.

72219247 is a deficient number, since it is larger than the sum of its proper divisors (8273153).

72219247 is a wasteful number, since it uses less digits than its factorization.

72219247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223625.

The product of its digits is 14112, while the sum is 34.

The square root of 72219247 is about 8498.1908074601. The cubic root of 72219247 is about 416.4386072139.

The spelling of 72219247 in words is "seventy-two million, two hundred nineteen thousand, two hundred forty-seven".