12645032231 has 16 divisors (see below), whose sum is σ = 13964929440. Its totient is φ = 11375925120.

The previous prime is 12645032227. The next prime is 12645032243. The reversal of 12645032231 is 13223054621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12645032231 - 2² = 12645032227 is a prime.

It is a super-2 number, since 2×12645032231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12645032194 and 12645032203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12645032201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233165 + ... + 282233.

It is an arithmetic number, because the mean of its divisors is an integer number (872808090).

Almost surely, 2^12645032231 is an apocalyptic number.

12645032231 is a deficient number, since it is larger than the sum of its proper divisors (1319897209).

12645032231 is a wasteful number, since it uses less digits than its factorization.

12645032231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49586.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 12645032231 its reverse (13223054621), we get a palindrome (25868086852).

The spelling of 12645032231 in words is "twelve billion, six hundred forty-five million, thirty-two thousand, two hundred thirty-one".