72223505 has 4 divisors (see below), whose sum is σ = 86668212. Its totient is φ = 57778800.

The previous prime is 72223483. The next prime is 72223511. The reversal of 72223505 is 50532227.

72223505 is nontrivially palindromic in base 4.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15311569 + 56911936 = 3913^2 + 7544^2 .

It is not a de Polignac number, because 72223505 - 2⁶ = 72223441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7222346 + ... + 7222355.

It is an arithmetic number, because the mean of its divisors is an integer number (21667053).

Almost surely, 2^72223505 is an apocalyptic number.

It is an amenable number.

72223505 is a deficient number, since it is larger than the sum of its proper divisors (14444707).

72223505 is a wasteful number, since it uses less digits than its factorization.

72223505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14444706.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 72223505 is about 8498.4413276789. The cubic root of 72223505 is about 416.4467913698.

The spelling of 72223505 in words is "seventy-two million, two hundred twenty-three thousand, five hundred five".