11807171231 has 4 divisors (see below), whose sum is σ = 11807479200. Its totient is φ = 11806863264.

The previous prime is 11807171219. The next prime is 11807171251. The reversal of 11807171231 is 13217170811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11807171231 is a prime.

It is a super-3 number, since 3×11807171231³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11807171251) 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, 86666 + ... + 176423.

It is an arithmetic number, because the mean of its divisors is an integer number (2951869800).

Almost surely, 2^11807171231 is an apocalyptic number.

11807171231 is a deficient number, since it is larger than the sum of its proper divisors (307969).

11807171231 is an equidigital number, since it uses as much as digits as its factorization.

11807171231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307968.

The product of its (nonzero) digits is 2352, while the sum is 32.

The spelling of 11807171231 in words is "eleven billion, eight hundred seven million, one hundred seventy-one thousand, two hundred thirty-one".