133117155 has 16 divisors (see below), whose sum is σ = 236652960. Its totient is φ = 70995744.

The previous prime is 133117151. The next prime is 133117213. The reversal of 133117155 is 551711331.

It is not a de Polignac number, because 133117155 - 2² = 133117151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (133117151) 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, 492892 + ... + 493161.

It is an arithmetic number, because the mean of its divisors is an integer number (14790810).

Almost surely, 2^133117155 is an apocalyptic number.

133117155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133117155 is a deficient number, since it is larger than the sum of its proper divisors (103535805).

133117155 is an equidigital number, since it uses as much as digits as its factorization.

133117155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986067 (or 986061 counting only the distinct ones).

The product of its digits is 1575, while the sum is 27.

The square root of 133117155 is about 11537.6407900402. The cubic root of 133117155 is about 510.5967064180.

Adding to 133117155 its reverse (551711331), we get a palindrome (684828486).

The spelling of 133117155 in words is "one hundred thirty-three million, one hundred seventeen thousand, one hundred fifty-five".