133512220 has 36 divisors (see below), whose sum is σ = 297851400. Its totient is φ = 50261248.

The previous prime is 133512199. The next prime is 133512233. The reversal of 133512220 is 22215331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5770 + ... + 17329.

It is an arithmetic number, because the mean of its divisors is an integer number (8273650).

Almost surely, 2^133512220 is an apocalyptic number.

133512220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133512220 is an abundant number, since it is smaller than the sum of its proper divisors (164339180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133512220 is a wasteful number, since it uses less digits than its factorization.

133512220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23142 (or 23123 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 133512220 is about 11554.7488073086. The cubic root of 133512220 is about 511.1013237291.

Adding to 133512220 its reverse (22215331), we get a palindrome (155727551).

The spelling of 133512220 in words is "one hundred thirty-three million, five hundred twelve thousand, two hundred twenty".