133440172 has 6 divisors (see below), whose sum is σ = 233520308. Its totient is φ = 66720084.

The previous prime is 133440163. The next prime is 133440193. The reversal of 133440172 is 271044331.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16680018 + ... + 16680025.

Almost surely, 2^133440172 is an apocalyptic number.

It is an amenable number.

133440172 is a deficient number, since it is larger than the sum of its proper divisors (100080136).

133440172 is a wasteful number, since it uses less digits than its factorization.

133440172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33360047 (or 33360045 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 133440172 is about 11551.6307073937. The cubic root of 133440172 is about 511.0093709626.

The spelling of 133440172 in words is "one hundred thirty-three million, four hundred forty thousand, one hundred seventy-two".