172543140 has 288 divisors, whose sum is σ = 666731520. Its totient is φ = 35078400.

The previous prime is 172543109. The next prime is 172543141. The reversal of 172543140 is 41345271.

It is a super-3 number, since 3×172543140³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (172543141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 817635 + ... + 817845.

It is an arithmetic number, because the mean of its divisors is an integer number (2315040).

Almost surely, 2^172543140 is an apocalyptic number.

172543140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172543140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333365760).

172543140 is an abundant number, since it is smaller than the sum of its proper divisors (494188380).

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

172543140 is a wasteful number, since it uses less digits than its factorization.

172543140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 172543140 is about 13135.5677456287. The cubic root of 172543140 is about 556.7145420396.

The spelling of 172543140 in words is "one hundred seventy-two million, five hundred forty-three thousand, one hundred forty".