141618181 has 4 divisors (see below), whose sum is σ = 141645664. Its totient is φ = 141590700.

The previous prime is 141618167. The next prime is 141618193. The reversal of 141618181 is 181816141.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 181816141 = 13 ⋅13985857.

It is a 3-Lehmer number, since φ(141618181) divides (141618181-1)³.

It is a cyclic number.

It is not a de Polignac number, because 141618181 - 2⁹ = 141617669 is a prime.

It is a super-2 number, since 2×141618181² = 40111418379497522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141648181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3435 + ... + 17176.

It is an arithmetic number, because the mean of its divisors is an integer number (35411416).

Almost surely, 2^141618181 is an apocalyptic number.

141618181 is the 6871-st octagonal number.

It is an amenable number.

141618181 is a deficient number, since it is larger than the sum of its proper divisors (27483).

141618181 is an equidigital number, since it uses as much as digits as its factorization.

141618181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27482.

The product of its digits is 1536, while the sum is 31.

The square root of 141618181 is about 11900.3437345314. The cubic root of 141618181 is about 521.2423217896.

The spelling of 141618181 in words is "one hundred forty-one million, six hundred eighteen thousand, one hundred eighty-one".