72216574 has 4 divisors (see below), whose sum is σ = 108324864. Its totient is φ = 36108286.

The previous prime is 72216541. The next prime is 72216631. The reversal of 72216574 is 47561227.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18054142 + ... + 18054145.

It is an arithmetic number, because the mean of its divisors is an integer number (27081216).

Almost surely, 2^72216574 is an apocalyptic number.

72216574 is a deficient number, since it is larger than the sum of its proper divisors (36108290).

72216574 is a wasteful number, since it uses less digits than its factorization.

72216574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36108289.

The product of its digits is 23520, while the sum is 34.

The square root of 72216574 is about 8498.0335372367. The cubic root of 72216574 is about 416.4334693678.

The spelling of 72216574 in words is "seventy-two million, two hundred sixteen thousand, five hundred seventy-four".