133333333220 has 12 divisors (see below), whose sum is σ = 279999999804. Its totient is φ = 53333333280.

The previous prime is 133333333187. The next prime is 133333333247. The reversal of 133333333220 is 22333333331.

It can be written as a sum of positive squares in 2 ways, for example, as 54954611776 + 78378721444 = 234424^2 + 279962^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333333311 + ... + 3333333350.

It is an arithmetic number, because the mean of its divisors is an integer number (23333333317).

Almost surely, 2^133333333220 is an apocalyptic number.

133333333220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133333333220 is an abundant number, since it is smaller than the sum of its proper divisors (146666666584).

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

133333333220 is a wasteful number, since it uses less digits than its factorization.

133333333220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666666670 (or 6666666668 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 29.

Adding to 133333333220 its reverse (22333333331), we get a palindrome (155666666551).

The spelling of 133333333220 in words is "one hundred thirty-three billion, three hundred thirty-three million, three hundred thirty-three thousand, two hundred twenty".