181342140 has 72 divisors (see below), whose sum is σ = 590666832. Its totient is φ = 41448960.

The previous prime is 181342103. The next prime is 181342151. The reversal of 181342140 is 41243181.

181342140 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

181342140 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 181342140.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27901 + ... + 33780.

It is an arithmetic number, because the mean of its divisors is an integer number (8203706).

Almost surely, 2^181342140 is an apocalyptic number.

181342140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181342140 is an abundant number, since it is smaller than the sum of its proper divisors (409324692).

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

181342140 is a wasteful number, since it uses less digits than its factorization.

181342140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61707 (or 61698 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 181342140 is about 13466.3335767387. Note that the first 3 decimals coincide. The cubic root of 181342140 is about 566.0214794547.

The spelling of 181342140 in words is "one hundred eighty-one million, three hundred forty-two thousand, one hundred forty".