133375155 has 32 divisors (see below), whose sum is σ = 225331200. Its totient is φ = 67180032.

The previous prime is 133375153. The next prime is 133375163. The reversal of 133375155 is 551573331.

It is not a de Polignac number, because 133375155 - 2¹ = 133375153 is a prime.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (133375153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136027 + ... + 137003.

It is an arithmetic number, because the mean of its divisors is an integer number (7041600).

Almost surely, 2^133375155 is an apocalyptic number.

133375155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133375155 is a deficient number, since it is larger than the sum of its proper divisors (91956045).

133375155 is a wasteful number, since it uses less digits than its factorization.

133375155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483.

The product of its digits is 23625, while the sum is 33.

The square root of 133375155 is about 11548.8161730976. The cubic root of 133375155 is about 510.9263632414.

The spelling of 133375155 in words is "one hundred thirty-three million, three hundred seventy-five thousand, one hundred fifty-five".