7221157201 has 8 divisors (see below), whose sum is σ = 7656728040. Its totient is φ = 6786786048.

The previous prime is 7221157193. The next prime is 7221157213. The reversal of 7221157201 is 1027511227.

It can be written as a sum of positive squares in 4 ways, for example, as 219484225 + 7001672976 = 14815^2 + 83676^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7221157201 - 2³ = 7221157193 is a prime.

It is a super-2 number, since 2×7221157201² (a number of 21 digits) contains 22 as substring.

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 7221157201.

It is not an unprimeable number, because it can be changed into a prime (7221157231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287506 + ... + 311611.

It is an arithmetic number, because the mean of its divisors is an integer number (957091005).

Almost surely, 2^7221157201 is an apocalyptic number.

It is an amenable number.

7221157201 is a deficient number, since it is larger than the sum of its proper divisors (435570839).

7221157201 is a wasteful number, since it uses less digits than its factorization.

7221157201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599843.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 7221157201 is about 84977.3922934800. The cubic root of 7221157201 is about 1932.8683134033.

Adding to 7221157201 its reverse (1027511227), we get a palindrome (8248668428).

It can be divided in two parts, 722115 and 7201, that added together give a square (729316 = 854²).

The spelling of 7221157201 in words is "seven billion, two hundred twenty-one million, one hundred fifty-seven thousand, two hundred one".