72200001 has 4 divisors (see below), whose sum is σ = 96266672. Its totient is φ = 48133332.

The previous prime is 72199997. The next prime is 72200021. The reversal of 72200001 is 10000227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72200001 - 2² = 72199997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72200001.

It is not an unprimeable number, because it can be changed into a prime (72200021) 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 3 ways as a sum of consecutive naturals, for example, 12033331 + ... + 12033336.

It is an arithmetic number, because the mean of its divisors is an integer number (24066668).

Almost surely, 2^72200001 is an apocalyptic number.

It is an amenable number.

72200001 is a deficient number, since it is larger than the sum of its proper divisors (24066671).

72200001 is a wasteful number, since it uses less digits than its factorization.

72200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24066670.

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 72200001 is about 8497.0583733431. The cubic root of 72200001 is about 416.4016111229.

Adding to 72200001 its reverse (10000227), we get a palindrome (82200228).

The spelling of 72200001 in words is "seventy-two million, two hundred thousand, one".