133881455 has 4 divisors (see below), whose sum is σ = 160657752. Its totient is φ = 107105160.

The previous prime is 133881431. The next prime is 133881491. The reversal of 133881455 is 554188331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 133881455 - 2²⁶ = 66772591 is a prime.

It is a Duffinian number.

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, 13388141 + ... + 13388150.

It is an arithmetic number, because the mean of its divisors is an integer number (40164438).

Almost surely, 2^133881455 is an apocalyptic number.

133881455 is a deficient number, since it is larger than the sum of its proper divisors (26776297).

133881455 is an equidigital number, since it uses as much as digits as its factorization.

133881455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26776296.

The product of its digits is 57600, while the sum is 38.

The square root of 133881455 is about 11570.7154057128. The cubic root of 133881455 is about 511.5720491694.

The spelling of 133881455 in words is "one hundred thirty-three million, eight hundred eighty-one thousand, four hundred fifty-five".