116181381 has 4 divisors (see below), whose sum is σ = 154908512. Its totient is φ = 77454252.

The previous prime is 116181367. The next prime is 116181389. The reversal of 116181381 is 183181611.

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: 183181611 = 3 ⋅61060537.

It is not a de Polignac number, because 116181381 - 2⁷ = 116181253 is a prime.

It is a super-2 number, since 2×116181381² = 26996226582134322, 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 (116181389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19363561 + ... + 19363566.

It is an arithmetic number, because the mean of its divisors is an integer number (38727128).

Almost surely, 2^116181381 is an apocalyptic number.

It is an amenable number.

116181381 is a deficient number, since it is larger than the sum of its proper divisors (38727131).

116181381 is an equidigital number, since it uses as much as digits as its factorization.

116181381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38727130.

The product of its digits is 1152, while the sum is 30.

The square root of 116181381 is about 10778.7467267767. The cubic root of 116181381 is about 487.9539576847.

The spelling of 116181381 in words is "one hundred sixteen million, one hundred eighty-one thousand, three hundred eighty-one".