181343406 has 16 divisors (see below), whose sum is σ = 368100864. Its totient is φ = 59545464.

The previous prime is 181343399. The next prime is 181343411. The reversal of 181343406 is 604343181.

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, 225150 + ... + 225953.

It is an arithmetic number, because the mean of its divisors is an integer number (23006304).

Almost surely, 2^181343406 is an apocalyptic number.

181343406 is an abundant number, since it is smaller than the sum of its proper divisors (186757458).

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

181343406 is a wasteful number, since it uses less digits than its factorization.

181343406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451175.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 181343406 is about 13466.3805827698. The cubic root of 181343406 is about 566.0227966362.

Adding to 181343406 its reverse (604343181), we get a palindrome (785686587).

The spelling of 181343406 in words is "one hundred eighty-one million, three hundred forty-three thousand, four hundred six".