133515505 has 4 divisors (see below), whose sum is σ = 160218612. Its totient is φ = 106812400.

The previous prime is 133515497. The next prime is 133515509. The reversal of 133515505 is 505515331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505515331 = 113 ⋅4473587.

It can be written as a sum of positive squares in 2 ways, for example, as 52533504 + 80982001 = 7248^2 + 8999^2 .

It is not a de Polignac number, because 133515505 - 2³ = 133515497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133515509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13351546 + ... + 13351555.

It is an arithmetic number, because the mean of its divisors is an integer number (40054653).

Almost surely, 2^133515505 is an apocalyptic number.

It is an amenable number.

133515505 is a deficient number, since it is larger than the sum of its proper divisors (26703107).

133515505 is an equidigital number, since it uses as much as digits as its factorization.

133515505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26703106.

The product of its (nonzero) digits is 5625, while the sum is 28.

The square root of 133515505 is about 11554.8909557815. The cubic root of 133515505 is about 511.1055154904.

The spelling of 133515505 in words is "one hundred thirty-three million, five hundred fifteen thousand, five hundred five".