812182155231 has 8 divisors (see below), whose sum is σ = 1082914193664. Its totient is φ = 541452443480.

The previous prime is 812182155217. The next prime is 812182155241. The reversal of 812182155231 is 132551281218.

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 812182155231 - 2¹⁰ = 812182154207 is a prime.

It is a super-2 number, since 2×812182155231² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 812182155231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812182155241) 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, 544096 + ... + 1385786.

It is an arithmetic number, because the mean of its divisors is an integer number (135364274208).

Almost surely, 2^812182155231 is an apocalyptic number.

812182155231 is a deficient number, since it is larger than the sum of its proper divisors (270732038433).

812182155231 is a wasteful number, since it uses less digits than its factorization.

812182155231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163341.

The product of its digits is 38400, while the sum is 39.

The spelling of 812182155231 in words is "eight hundred twelve billion, one hundred eighty-two million, one hundred fifty-five thousand, two hundred thirty-one".