7381133221 has 24 divisors (see below), whose sum is σ = 9287187840. Its totient is φ = 5742216480.

The previous prime is 7381133173. The next prime is 7381133261. The reversal of 7381133221 is 1223311837.

It is not a de Polignac number, because 7381133221 - 2⁷ = 7381133093 is a prime.

It is a super-2 number, since 2×7381133221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7381133261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 541275 + ... + 554743.

It is an arithmetic number, because the mean of its divisors is an integer number (386966160).

Almost surely, 2^7381133221 is an apocalyptic number.

It is an amenable number.

7381133221 is a deficient number, since it is larger than the sum of its proper divisors (1906054619).

7381133221 is a wasteful number, since it uses less digits than its factorization.

7381133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14145 (or 14134 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 7381133221 is about 85913.5217588012. The cubic root of 7381133221 is about 1947.0376427761.

The spelling of 7381133221 in words is "seven billion, three hundred eighty-one million, one hundred thirty-three thousand, two hundred twenty-one".