133144215 has 32 divisors (see below), whose sum is σ = 218116800. Its totient is φ = 69328896.

The previous prime is 133144169. The next prime is 133144243. The reversal of 133144215 is 512441331.

It is a happy number.

It is not a de Polignac number, because 133144215 - 2¹⁰ = 133143191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296311 + ... + 296759.

It is an arithmetic number, because the mean of its divisors is an integer number (6816150).

Almost surely, 2^133144215 is an apocalyptic number.

133144215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133144215 is a deficient number, since it is larger than the sum of its proper divisors (84972585).

133144215 is a wasteful number, since it uses less digits than its factorization.

133144215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883.

The product of its digits is 1440, while the sum is 24.

The square root of 133144215 is about 11538.8134138654. The cubic root of 133144215 is about 510.6313020361.

Adding to 133144215 its reverse (512441331), we get a palindrome (645585546).

The spelling of 133144215 in words is "one hundred thirty-three million, one hundred forty-four thousand, two hundred fifteen".