133393220 has 24 divisors (see below), whose sum is σ = 296604504. Its totient is φ = 50218496.

The previous prime is 133393189. The next prime is 133393291. The reversal of 133393220 is 22393331.

It can be written as a sum of positive squares in 4 ways, for example, as 40347904 + 93045316 = 6352^2 + 9646^2 .

It is a super-2 number, since 2×133393220² = 35587502283936800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133393220.

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, 195827 + ... + 196506.

It is an arithmetic number, because the mean of its divisors is an integer number (12358521).

Almost surely, 2^133393220 is an apocalyptic number.

133393220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133393220 is an abundant number, since it is smaller than the sum of its proper divisors (163211284).

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

133393220 is a wasteful number, since it uses less digits than its factorization.

133393220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392359 (or 392357 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 26.

The square root of 133393220 is about 11549.5982614115. The cubic root of 133393220 is about 510.9494296765.

The spelling of 133393220 in words is "one hundred thirty-three million, three hundred ninety-three thousand, two hundred twenty".