72100722 has 16 divisors (see below), whose sum is σ = 150471360. Its totient is φ = 22988592.

The previous prime is 72100703. The next prime is 72100727. The reversal of 72100722 is 22700127.

It is a super-2 number, since 2×72100722² = 10397028225842568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72100727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261097 + ... + 261372.

It is an arithmetic number, because the mean of its divisors is an integer number (9404460).

Almost surely, 2^72100722 is an apocalyptic number.

72100722 is an abundant number, since it is smaller than the sum of its proper divisors (78370638).

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

72100722 is a wasteful number, since it uses less digits than its factorization.

72100722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522497.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 72100722 is about 8491.2144007792. The cubic root of 72100722 is about 416.2106651501.

Adding to 72100722 its reverse (22700127), we get a palindrome (94800849).

The spelling of 72100722 in words is "seventy-two million, one hundred thousand, seven hundred twenty-two".