133172370 has 32 divisors (see below), whose sum is σ = 355127040. Its totient is φ = 35512560.

The previous prime is 133172359. The next prime is 133172371. The reversal of 133172370 is 73271331.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (133172371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246346 + ... + 246885.

It is an arithmetic number, because the mean of its divisors is an integer number (11097720).

Almost surely, 2^133172370 is an apocalyptic number.

133172370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133172370 is an abundant number, since it is smaller than the sum of its proper divisors (221954670).

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

133172370 is a wasteful number, since it uses less digits than its factorization.

133172370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493247 (or 493241 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 27.

The square root of 133172370 is about 11540.0333621701. The cubic root of 133172370 is about 510.6672926123.

The spelling of 133172370 in words is "one hundred thirty-three million, one hundred seventy-two thousand, three hundred seventy".