133421515 has 8 divisors (see below), whose sum is σ = 168532560. Its totient is φ = 101119392.

The previous prime is 133421467. The next prime is 133421521. The reversal of 133421515 is 515124331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133421515 - 2⁹ = 133421003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133421515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702124 + ... + 702313.

It is an arithmetic number, because the mean of its divisors is an integer number (21066570).

Almost surely, 2^133421515 is an apocalyptic number.

133421515 is a deficient number, since it is larger than the sum of its proper divisors (35111045).

133421515 is a wasteful number, since it uses less digits than its factorization.

133421515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404461.

The product of its digits is 1800, while the sum is 25.

The square root of 133421515 is about 11550.8231308422. The cubic root of 133421515 is about 510.9855541813.

Adding to 133421515 its reverse (515124331), we get a palindrome (648545846).

The spelling of 133421515 in words is "one hundred thirty-three million, four hundred twenty-one thousand, five hundred fifteen".