103661181 has 32 divisors (see below), whose sum is σ = 166131840. Its totient is φ = 63504000.

The previous prime is 103661177. The next prime is 103661183. The reversal of 103661181 is 181166301.

103661181 is a `hidden beast` number, since 10 + 36 + 611 + 8 + 1 = 666.

It is not a de Polignac number, because 103661181 - 2² = 103661177 is a prime.

It is a super-2 number, since 2×103661181² = 21491280892629522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103661183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98106 + ... + 99156.

It is an arithmetic number, because the mean of its divisors is an integer number (5191620).

Almost surely, 2^103661181 is an apocalyptic number.

It is an amenable number.

103661181 is a deficient number, since it is larger than the sum of its proper divisors (62470659).

103661181 is a wasteful number, since it uses less digits than its factorization.

103661181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354 (or 1348 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 103661181 is about 10181.4135069744. The cubic root of 103661181 is about 469.7556916501.

The spelling of 103661181 in words is "one hundred three million, six hundred sixty-one thousand, one hundred eighty-one".