72215572 has 48 divisors (see below), whose sum is σ = 149474304. Its totient is φ = 30096000.

The previous prime is 72215569. The next prime is 72215573. The reversal of 72215572 is 27551227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72215573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108922 + ... + 109582.

It is an arithmetic number, because the mean of its divisors is an integer number (3114048).

Almost surely, 2^72215572 is an apocalyptic number.

It is an amenable number.

72215572 is an abundant number, since it is smaller than the sum of its proper divisors (77258732).

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

72215572 is a wasteful number, since it uses less digits than its factorization.

72215572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880 (or 878 counting only the distinct ones).

The product of its digits is 9800, while the sum is 31.

The square root of 72215572 is about 8497.9745822166. The cubic root of 72215572 is about 416.4315433636.

Adding to 72215572 its reverse (27551227), we get a palindrome (99766799).

It can be divided in two parts, 722155 and 72, that added together give a palindrome (722227).

The spelling of 72215572 in words is "seventy-two million, two hundred fifteen thousand, five hundred seventy-two".