72223545 has 8 divisors (see below), whose sum is σ = 115557696. Its totient is φ = 38519216.

The previous prime is 72223517. The next prime is 72223553. The reversal of 72223545 is 54532227.

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 72223545 - 2¹¹ = 72221497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2407437 + ... + 2407466.

It is an arithmetic number, because the mean of its divisors is an integer number (14444712).

Almost surely, 2^72223545 is an apocalyptic number.

It is an amenable number.

72223545 is a deficient number, since it is larger than the sum of its proper divisors (43334151).

72223545 is a wasteful number, since it uses less digits than its factorization.

72223545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4814911.

The product of its digits is 16800, while the sum is 30.

The square root of 72223545 is about 8498.4436810513. The cubic root of 72223545 is about 416.4468682509.

The spelling of 72223545 in words is "seventy-two million, two hundred twenty-three thousand, five hundred forty-five".