133423515 has 12 divisors (see below), whose sum is σ = 231267504. Its totient is φ = 71159184.

The previous prime is 133423513. The next prime is 133423541. The reversal of 133423515 is 515324331.

133423515 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 133423515 - 2¹ = 133423513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133423513) 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, 1482439 + ... + 1482528.

It is an arithmetic number, because the mean of its divisors is an integer number (19272292).

Almost surely, 2^133423515 is an apocalyptic number.

133423515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133423515 is a deficient number, since it is larger than the sum of its proper divisors (97843989).

133423515 is a wasteful number, since it uses less digits than its factorization.

133423515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964978 (or 2964975 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 133423515 is about 11550.9097044345. The cubic root of 133423515 is about 510.9881074077.

Adding to 133423515 its reverse (515324331), we get a palindrome (648747846).

The spelling of 133423515 in words is "one hundred thirty-three million, four hundred twenty-three thousand, five hundred fifteen".