133401220 has 24 divisors (see below), whose sum is σ = 280828800. Its totient is φ = 53229792.

The previous prime is 133401211. The next prime is 133401239. The reversal of 133401220 is 22104331.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 133401194 and 133401203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421 + ... + 16339.

It is an arithmetic number, because the mean of its divisors is an integer number (11701200).

Almost surely, 2^133401220 is an apocalyptic number.

133401220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133401220 is an abundant number, since it is smaller than the sum of its proper divisors (147427580).

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

133401220 is a wasteful number, since it uses less digits than its factorization.

133401220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16347 (or 16345 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 133401220 is about 11549.9445886117. The cubic root of 133401220 is about 510.9596438731.

Adding to 133401220 its reverse (22104331), we get a palindrome (155505551).

The spelling of 133401220 in words is "one hundred thirty-three million, four hundred one thousand, two hundred twenty".