133335220 has 12 divisors (see below), whose sum is σ = 280004004. Its totient is φ = 53334080.

The previous prime is 133335211. The next prime is 133335263. The reversal of 133335220 is 22533331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14699556 + 118635664 = 3834^2 + 10892^2 .

It is a junction number, because it is equal to n+sod(n) for n = 133335191 and 133335200.

It is a congruent number.

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, 3333361 + ... + 3333400.

It is an arithmetic number, because the mean of its divisors is an integer number (23333667).

Almost surely, 2^133335220 is an apocalyptic number.

133335220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133335220 is an abundant number, since it is smaller than the sum of its proper divisors (146668784).

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

133335220 is a wasteful number, since it uses less digits than its factorization.

133335220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666770 (or 6666768 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 22.

The square root of 133335220 is about 11547.0870785666. The cubic root of 133335220 is about 510.8753645351.

Adding to 133335220 its reverse (22533331), we get a palindrome (155868551).

The spelling of 133335220 in words is "one hundred thirty-three million, three hundred thirty-five thousand, two hundred twenty".