131928181 has 8 divisors (see below), whose sum is σ = 164481984. Its totient is φ = 102801120.

The previous prime is 131928179. The next prime is 131928193. The reversal of 131928181 is 181829131.

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 131928181 - 2¹ = 131928179 is a prime.

It is a super-2 number, since 2×131928181² = 34810089883937522, 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 (131928481) 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, 856600 + ... + 856753.

It is an arithmetic number, because the mean of its divisors is an integer number (20560248).

Almost surely, 2^131928181 is an apocalyptic number.

131928181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131928181 is a deficient number, since it is larger than the sum of its proper divisors (32553803).

131928181 is a wasteful number, since it uses less digits than its factorization.

131928181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713371.

The product of its digits is 3456, while the sum is 34.

The square root of 131928181 is about 11485.9993470311. Note that the first 3 decimals coincide. The cubic root of 131928181 is about 509.0719776036.

The spelling of 131928181 in words is "one hundred thirty-one million, nine hundred twenty-eight thousand, one hundred eighty-one".