72250722 has 12 divisors (see below), whose sum is σ = 156543270. Its totient is φ = 24083568.

The previous prime is 72250721. The next prime is 72250727. The reversal of 72250722 is 22705227.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66243321 + 6007401 = 8139^2 + 2451^2 .

It is not an unprimeable number, because it can be changed into a prime (72250721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2006947 + ... + 2006982.

Almost surely, 2^72250722 is an apocalyptic number.

72250722 is an abundant number, since it is smaller than the sum of its proper divisors (84292548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72250722 is a wasteful number, since it uses less digits than its factorization.

72250722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013937 (or 4013934 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 72250722 is about 8500.0424704821. The cubic root of 72250722 is about 416.4990966355.

Adding to 72250722 its reverse (22705227), we get a palindrome (94955949).

The spelling of 72250722 in words is "seventy-two million, two hundred fifty thousand, seven hundred twenty-two".