181379105831 has 16 divisors (see below), whose sum is σ = 228373959168. Its totient is φ = 139935012000.

The previous prime is 181379105827. The next prime is 181379105923. The reversal of 181379105831 is 138501973181.

It is not a de Polignac number, because 181379105831 - 2² = 181379105827 is a prime.

It is a super-2 number, since 2×181379105831² (a number of 23 digits) 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 (181379105821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11653475 + ... + 11669028.

It is an arithmetic number, because the mean of its divisors is an integer number (14273372448).

Almost surely, 2^181379105831 is an apocalyptic number.

181379105831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

181379105831 is a deficient number, since it is larger than the sum of its proper divisors (46994853337).

181379105831 is a wasteful number, since it uses less digits than its factorization.

181379105831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23322622.

The product of its (nonzero) digits is 181440, while the sum is 47.

The spelling of 181379105831 in words is "one hundred eighty-one billion, three hundred seventy-nine million, one hundred five thousand, eight hundred thirty-one".