133215320 has 48 divisors (see below), whose sum is σ = 348675840. Its totient is φ = 45673152.

The previous prime is 133215319. The next prime is 133215337. The reversal of 133215320 is 23512331.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 133215292 and 133215301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32024 + ... + 35943.

It is an arithmetic number, because the mean of its divisors is an integer number (7264080).

Almost surely, 2^133215320 is an apocalyptic number.

133215320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133215320 is an abundant number, since it is smaller than the sum of its proper divisors (215460520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133215320 is a wasteful number, since it uses less digits than its factorization.

133215320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67992 (or 67981 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 133215320 is about 11541.8941253158. The cubic root of 133215320 is about 510.7221858876.

Adding to 133215320 its reverse (23512331), we get a palindrome (156727651).

The spelling of 133215320 in words is "one hundred thirty-three million, two hundred fifteen thousand, three hundred twenty".