181342381 has 8 divisors (see below), whose sum is σ = 197982144. Its totient is φ = 164728320.

The previous prime is 181342363. The next prime is 181342409. The reversal of 181342381 is 183243181.

181342381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 181342381 - 2¹¹ = 181340333 is a prime.

It is a super-2 number, since 2×181342381² = 65770118293498322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181342321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10221 + ... + 21613.

It is an arithmetic number, because the mean of its divisors is an integer number (24747768).

Almost surely, 2^181342381 is an apocalyptic number.

181342381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

181342381 is a deficient number, since it is larger than the sum of its proper divisors (16639763).

181342381 is a wasteful number, since it uses less digits than its factorization.

181342381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12851.

The product of its digits is 4608, while the sum is 31.

The square root of 181342381 is about 13466.3425249769. The cubic root of 181342381 is about 566.0217301983.

The spelling of 181342381 in words is "one hundred eighty-one million, three hundred forty-two thousand, three hundred eighty-one".