171881240 has 16 divisors (see below), whose sum is σ = 386732880. Its totient is φ = 68752480.

The previous prime is 171881221. The next prime is 171881257. The reversal of 171881240 is 42188171.

171881240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 171881197 and 171881206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2148476 + ... + 2148555.

It is an arithmetic number, because the mean of its divisors is an integer number (24170805).

Almost surely, 2^171881240 is an apocalyptic number.

171881240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171881240 is an abundant number, since it is smaller than the sum of its proper divisors (214851640).

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

171881240 is a wasteful number, since it uses less digits than its factorization.

171881240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297042 (or 4297038 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 171881240 is about 13110.3485842292. The cubic root of 171881240 is about 556.0017511116.

The spelling of 171881240 in words is "one hundred seventy-one million, eight hundred eighty-one thousand, two hundred forty".