133003221 has 32 divisors (see below), whose sum is σ = 197041152. Its totient is φ = 79280640.

The previous prime is 133003207. The next prime is 133003231. The reversal of 133003221 is 122300331.

It is not a de Polignac number, because 133003221 - 2²³ = 124614613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133003221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133003231) 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, 356391 + ... + 356763.

It is an arithmetic number, because the mean of its divisors is an integer number (6157536).

Almost surely, 2^133003221 is an apocalyptic number.

It is an amenable number.

133003221 is a deficient number, since it is larger than the sum of its proper divisors (64037931).

133003221 is a wasteful number, since it uses less digits than its factorization.

133003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 133003221 is about 11532.7022418859. The cubic root of 133003221 is about 510.4509928420.

Adding to 133003221 its reverse (122300331), we get a palindrome (255303552).

The spelling of 133003221 in words is "one hundred thirty-three million, three thousand, two hundred twenty-one".