172540198 has 16 divisors (see below), whose sum is σ = 268537680. Its totient is φ = 83045536.

The previous prime is 172540189. The next prime is 172540201. The reversal of 172540198 is 891045271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15840 + ... + 24412.

It is an arithmetic number, because the mean of its divisors is an integer number (16783605).

Almost surely, 2^172540198 is an apocalyptic number.

172540198 is a deficient number, since it is larger than the sum of its proper divisors (95997482).

172540198 is a wasteful number, since it uses less digits than its factorization.

172540198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8951.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 172540198 is about 13135.4557591277. The cubic root of 172540198 is about 556.7113778773.

The spelling of 172540198 in words is "one hundred seventy-two million, five hundred forty thousand, one hundred ninety-eight".