133220252 has 12 divisors (see below), whose sum is σ = 254329656. Its totient is φ = 60554640.

The previous prime is 133220251. The next prime is 133220261. The reversal of 133220252 is 252022331.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133220251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513823 + ... + 1513910.

It is an arithmetic number, because the mean of its divisors is an integer number (21194138).

Almost surely, 2^133220252 is an apocalyptic number.

It is an amenable number.

133220252 is a deficient number, since it is larger than the sum of its proper divisors (121109404).

133220252 is a wasteful number, since it uses less digits than its factorization.

133220252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027748 (or 3027746 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 133220252 is about 11542.1077797775. The cubic root of 133220252 is about 510.7284885930.

Adding to 133220252 its reverse (252022331), we get a palindrome (385242583).

The spelling of 133220252 in words is "one hundred thirty-three million, two hundred twenty thousand, two hundred fifty-two".