72254722 has 4 divisors (see below), whose sum is σ = 108382086. Its totient is φ = 36127360.

The previous prime is 72254717. The next prime is 72254773. The reversal of 72254722 is 22745227.

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

It can be written as a sum of positive squares in only one way, i.e., 70241161 + 2013561 = 8381^2 + 1419^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18063679 + ... + 18063682.

Almost surely, 2^72254722 is an apocalyptic number.

72254722 is a deficient number, since it is larger than the sum of its proper divisors (36127364).

72254722 is a wasteful number, since it uses less digits than its factorization.

72254722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36127363.

The product of its digits is 15680, while the sum is 31.

The square root of 72254722 is about 8500.2777601676. The cubic root of 72254722 is about 416.5067826747.

Adding to 72254722 its reverse (22745227), we get a palindrome (94999949).

The spelling of 72254722 in words is "seventy-two million, two hundred fifty-four thousand, seven hundred twenty-two".