202172130 has 24 divisors (see below), whose sum is σ = 525647772. Its totient is φ = 53912544.

The previous prime is 202172129. The next prime is 202172161. The reversal of 202172130 is 31271202.

It can be written as a sum of positive squares in 2 ways, for example, as 169442289 + 32729841 = 13017^2 + 5721^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1123089 + ... + 1123268.

Almost surely, 2^202172130 is an apocalyptic number.

202172130 is an abundant number, since it is smaller than the sum of its proper divisors (323475642).

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

202172130 is a wasteful number, since it uses less digits than its factorization.

202172130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246370 (or 2246367 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 202172130 is about 14218.7246263510. The cubic root of 202172130 is about 586.9130446880.

The spelling of 202172130 in words is "two hundred two million, one hundred seventy-two thousand, one hundred thirty".