12155431452 has 36 divisors (see below), whose sum is σ = 29307139848. Its totient is φ = 3921103200.

The previous prime is 12155431451. The next prime is 12155431471. The reversal of 12155431452 is 25413455121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155431451) 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, 515499 + ... + 538562.

It is an arithmetic number, because the mean of its divisors is an integer number (814087218).

Almost surely, 2^12155431452 is an apocalyptic number.

12155431452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12155431452 is an abundant number, since it is smaller than the sum of its proper divisors (17151708396).

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

12155431452 is a wasteful number, since it uses less digits than its factorization.

12155431452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054130 (or 1054097 counting only the distinct ones).

The product of its digits is 24000, while the sum is 33.

Adding to 12155431452 its reverse (25413455121), we get a palindrome (37568886573).

The spelling of 12155431452 in words is "twelve billion, one hundred fifty-five million, four hundred thirty-one thousand, four hundred fifty-two".