133556105 has 4 divisors (see below), whose sum is σ = 160267332. Its totient is φ = 106844880.

The previous prime is 133556081. The next prime is 133556123. The reversal of 133556105 is 501655331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501655331 = 67 ⋅7487393.

It can be written as a sum of positive squares in 2 ways, for example, as 13697401 + 119858704 = 3701^2 + 10948^2 .

It is not a de Polignac number, because 133556105 - 2¹⁶ = 133490569 is a prime.

It is a Duffinian 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, 13355606 + ... + 13355615.

It is an arithmetic number, because the mean of its divisors is an integer number (40066833).

Almost surely, 2^133556105 is an apocalyptic number.

It is an amenable number.

133556105 is a deficient number, since it is larger than the sum of its proper divisors (26711227).

133556105 is an equidigital number, since it uses as much as digits as its factorization.

133556105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26711226.

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 133556105 is about 11556.6476540561. The cubic root of 133556105 is about 511.1573166675.

The spelling of 133556105 in words is "one hundred thirty-three million, five hundred fifty-six thousand, one hundred five".