133348221 has 32 divisors (see below), whose sum is σ = 210021120. Its totient is φ = 83331072.

The previous prime is 133348219. The next prime is 133348247. The reversal of 133348221 is 122843331.

It is not a de Polignac number, because 133348221 - 2¹ = 133348219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133348261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161616 + ... + 162438.

It is an arithmetic number, because the mean of its divisors is an integer number (6563160).

Almost surely, 2^133348221 is an apocalyptic number.

It is an amenable number.

133348221 is a deficient number, since it is larger than the sum of its proper divisors (76672899).

133348221 is a wasteful number, since it uses less digits than its factorization.

133348221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 1196 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 133348221 is about 11547.6500206752. The cubic root of 133348221 is about 510.8919684870.

The spelling of 133348221 in words is "one hundred thirty-three million, three hundred forty-eight thousand, two hundred twenty-one".