29130181 has 8 divisors (see below), whose sum is σ = 30226680. Its totient is φ = 28039872.

The previous prime is 29130169. The next prime is 29130187. The reversal of 29130181 is 18103192.

It can be written as a sum of positive squares in 4 ways, for example, as 4040100 + 25090081 = 2010^2 + 5009^2 .

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 29130181 - 2⁵ = 29130149 is a prime.

It is a super-2 number, since 2×29130181² = 1697134890185522, 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 (29130187) 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, 9471 + ... + 12163.

It is an arithmetic number, because the mean of its divisors is an integer number (3778335).

Almost surely, 2^29130181 is an apocalyptic number.

It is an amenable number.

29130181 is a deficient number, since it is larger than the sum of its proper divisors (1096499).

29130181 is a wasteful number, since it uses less digits than its factorization.

29130181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 29130181 is about 5397.2382752663. The cubic root of 29130181 is about 307.6907173908.

It can be divided in two parts, 29 and 130181, that multiplied together give a square (3775249 = 1943²).

The spelling of 29130181 in words is "twenty-nine million, one hundred thirty thousand, one hundred eighty-one".