133515445 has 12 divisors (see below), whose sum is σ = 186377004. Its totient is φ = 91553280.

The previous prime is 133515443. The next prime is 133515457. The reversal of 133515445 is 544515331.

It can be written as a sum of positive squares in 2 ways, for example, as 20007729 + 113507716 = 4473^2 + 10654^2 .

It is not a de Polignac number, because 133515445 - 2¹ = 133515443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133515443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 272236 + ... + 272725.

It is an arithmetic number, because the mean of its divisors is an integer number (15531417).

Almost surely, 2^133515445 is an apocalyptic number.

It is an amenable number.

133515445 is a deficient number, since it is larger than the sum of its proper divisors (52861559).

133515445 is an equidigital number, since it uses as much as digits as its factorization.

133515445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544980 (or 544973 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 133515445 is about 11554.8883594780. Note that the first 3 decimals coincide. The cubic root of 133515445 is about 511.1054389292.

The spelling of 133515445 in words is "one hundred thirty-three million, five hundred fifteen thousand, four hundred forty-five".