133400220 has 48 divisors (see below), whose sum is σ = 377387808. Its totient is φ = 35205120.

The previous prime is 133400213. The next prime is 133400221. The reversal of 133400220 is 22004331.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 133400220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133400221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5641 + ... + 17280.

It is an arithmetic number, because the mean of its divisors is an integer number (7862246).

Almost surely, 2^133400220 is an apocalyptic number.

133400220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133400220 is an abundant number, since it is smaller than the sum of its proper divisors (243987588).

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

133400220 is a wasteful number, since it uses less digits than its factorization.

133400220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23030 (or 23028 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 133400220 is about 11549.9012982796. The cubic root of 133400220 is about 510.9583671209.

Adding to 133400220 its reverse (22004331), we get a palindrome (155404551).

The spelling of 133400220 in words is "one hundred thirty-three million, four hundred thousand, two hundred twenty".