133240215 has 32 divisors (see below), whose sum is σ = 217267200. Its totient is φ = 69713280.

The previous prime is 133240213. The next prime is 133240223. The reversal of 133240215 is 512042331.

It is not a de Polignac number, because 133240215 - 2¹ = 133240213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133240191 and 133240200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133240213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271120 + ... + 271610.

It is an arithmetic number, because the mean of its divisors is an integer number (6789600).

Almost surely, 2^133240215 is an apocalyptic number.

133240215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133240215 is a deficient number, since it is larger than the sum of its proper divisors (84026985).

133240215 is a wasteful number, since it uses less digits than its factorization.

133240215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 133240215 is about 11542.9725374359. The cubic root of 133240215 is about 510.7539981368.

Adding to 133240215 its reverse (512042331), we get a palindrome (645282546).

The spelling of 133240215 in words is "one hundred thirty-three million, two hundred forty thousand, two hundred fifteen".