181308061 has 8 divisors (see below), whose sum is σ = 199302048. Its totient is φ = 163566000.

The previous prime is 181308031. The next prime is 181308137. The reversal of 181308061 is 160803181.

It is a happy number.

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 181308061 - 2¹⁵ = 181275293 is a prime.

It is a super-2 number, since 2×181308061² = 65745225967159442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181308031) 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, 61470 + ... + 64351.

It is an arithmetic number, because the mean of its divisors is an integer number (24912756).

Almost surely, 2^181308061 is an apocalyptic number.

181308061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

181308061 is a deficient number, since it is larger than the sum of its proper divisors (17993987).

181308061 is a wasteful number, since it uses less digits than its factorization.

181308061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125963.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 181308061 is about 13465.0681765820. The cubic root of 181308061 is about 565.9860204150.

The spelling of 181308061 in words is "one hundred eighty-one million, three hundred eight thousand, sixty-one".