12431032155 has 12 divisors (see below), whose sum is σ = 21547122480. Its totient is φ = 6629883792.

The previous prime is 12431032151. The next prime is 12431032171. The reversal of 12431032155 is 55123013421.

12431032155 is a `hidden beast` number, since 1 + 24 + 310 + 321 + 5 + 5 = 666.

It is not a de Polignac number, because 12431032155 - 2² = 12431032151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12431032151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138122535 + ... + 138122624.

It is an arithmetic number, because the mean of its divisors is an integer number (1795593540).

Almost surely, 2^12431032155 is an apocalyptic number.

12431032155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12431032155 is a deficient number, since it is larger than the sum of its proper divisors (9116090325).

12431032155 is a wasteful number, since it uses less digits than its factorization.

12431032155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276245170 (or 276245167 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 12431032155 its reverse (55123013421), we get a palindrome (67554045576).

The spelling of 12431032155 in words is "twelve billion, four hundred thirty-one million, thirty-two thousand, one hundred fifty-five".