133204155 has 64 divisors (see below), whose sum is σ = 267632640. Its totient is φ = 55161216.

The previous prime is 133204151. The next prime is 133204177. The reversal of 133204155 is 551402331.

It is not a de Polignac number, because 133204155 - 2² = 133204151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133204151) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44434 + ... + 47336.

It is an arithmetic number, because the mean of its divisors is an integer number (4181760).

Almost surely, 2^133204155 is an apocalyptic number.

133204155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133204155 is an abundant number, since it is smaller than the sum of its proper divisors (134428485).

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

133204155 is a wasteful number, since it uses less digits than its factorization.

133204155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2960.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 133204155 is about 11541.4104424026. The cubic root of 133204155 is about 510.7079173272.

Adding to 133204155 its reverse (551402331), we get a palindrome (684606486).

The spelling of 133204155 in words is "one hundred thirty-three million, two hundred four thousand, one hundred fifty-five".