8123130181 has 4 divisors (see below), whose sum is σ = 8123436832. Its totient is φ = 8122823532.

The previous prime is 8123130157. The next prime is 8123130187. The reversal of 8123130181 is 1810313218.

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.

It is a cyclic number.

It is not a de Polignac number, because 8123130181 - 2¹³ = 8123121989 is a prime.

It is a super-2 number, since 2×8123130181² (a number of 21 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 (8123130187) 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, 109395 + ... + 167968.

It is an arithmetic number, because the mean of its divisors is an integer number (2030859208).

Almost surely, 2^8123130181 is an apocalyptic number.

It is an amenable number.

8123130181 is a deficient number, since it is larger than the sum of its proper divisors (306651).

8123130181 is a wasteful number, since it uses less digits than its factorization.

8123130181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306650.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 8123130181 is about 90128.4094001442. The cubic root of 8123130181 is about 2010.2086514750.

Adding to 8123130181 its reverse (1810313218), we get a palindrome (9933443399).

The spelling of 8123130181 in words is "eight billion, one hundred twenty-three million, one hundred thirty thousand, one hundred eighty-one".