133316220 has 48 divisors (see below), whose sum is σ = 374169600. Its totient is φ = 35466816.

The previous prime is 133316201. The next prime is 133316221. The reversal of 133316220 is 22613331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133316221) 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, 25381 + ... + 30179.

It is an arithmetic number, because the mean of its divisors is an integer number (7795200).

Almost surely, 2^133316220 is an apocalyptic number.

133316220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133316220 is an abundant number, since it is smaller than the sum of its proper divisors (240853380).

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

133316220 is a wasteful number, since it uses less digits than its factorization.

133316220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5274 (or 5272 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 133316220 is about 11546.2643309427. The cubic root of 133316220 is about 510.8510971459.

Adding to 133316220 its reverse (22613331), we get a palindrome (155929551).

The spelling of 133316220 in words is "one hundred thirty-three million, three hundred sixteen thousand, two hundred twenty".