133204340 has 12 divisors (see below), whose sum is σ = 279729156. Its totient is φ = 53281728.

The previous prime is 133204321. The next prime is 133204343. The reversal of 133204340 is 43402331.

It can be written as a sum of positive squares in 2 ways, for example, as 96746896 + 36457444 = 9836^2 + 6038^2 .

It is a super-4 number, since 4×133204340⁴ (a number of 34 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 6660217 = 133204340 / (1 + 3 + 3 + 2 + 0 + 4 + 3 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133204343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3330089 + ... + 3330128.

It is an arithmetic number, because the mean of its divisors is an integer number (23310763).

Almost surely, 2^133204340 is an apocalyptic number.

133204340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133204340 is an abundant number, since it is smaller than the sum of its proper divisors (146524816).

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

133204340 is a wasteful number, since it uses less digits than its factorization.

133204340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660226 (or 6660224 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 133204340 is about 11541.4184570182. The cubic root of 133204340 is about 510.7081537586.

Adding to 133204340 its reverse (43402331), we get a palindrome (176606671).

The spelling of 133204340 in words is "one hundred thirty-three million, two hundred four thousand, three hundred forty".