7221243133 has 16 divisors (see below), whose sum is σ = 7875307440. Its totient is φ = 6581689344.

The previous prime is 7221243097. The next prime is 7221243167. The reversal of 7221243133 is 3313421227.

It can be written as a sum of positive squares in 8 ways, for example, as 7628644 + 7213614489 = 2762^2 + 84933^2 .

It is a cyclic number.

It is not a de Polignac number, because 7221243133 - 2¹⁷ = 7221112061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221243193) 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, 406485 + ... + 423877.

It is an arithmetic number, because the mean of its divisors is an integer number (492206715).

Almost surely, 2^7221243133 is an apocalyptic number.

It is an amenable number.

7221243133 is a deficient number, since it is larger than the sum of its proper divisors (654064307).

7221243133 is a wasteful number, since it uses less digits than its factorization.

7221243133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17808.

The product of its digits is 6048, while the sum is 28.

The square root of 7221243133 is about 84977.8979088092. The cubic root of 7221243133 is about 1932.8759804376.

The spelling of 7221243133 in words is "seven billion, two hundred twenty-one million, two hundred forty-three thousand, one hundred thirty-three".