12553431228 has 36 divisors (see below), whose sum is σ = 34173230728. Its totient is φ = 3862594080.

The previous prime is 12553431181. The next prime is 12553431269. The reversal of 12553431228 is 82213435521.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12553431228² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12553431192 and 12553431201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13411318 + ... + 13412253.

Almost surely, 2^12553431228 is an apocalyptic number.

12553431228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12553431228 is an abundant number, since it is smaller than the sum of its proper divisors (21619799500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12553431228 is a wasteful number, since it uses less digits than its factorization.

12553431228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26823594 (or 26823589 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

Adding to 12553431228 its reverse (82213435521), we get a palindrome (94766866749).

The spelling of 12553431228 in words is "twelve billion, five hundred fifty-three million, four hundred thirty-one thousand, two hundred twenty-eight".