281435143812 has 12 divisors (see below), whose sum is σ = 656682002256. Its totient is φ = 93811714600.

The previous prime is 281435143807. The next prime is 281435143819. The reversal of 281435143812 is 218341534182.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×281435143812² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (281435143819) 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 3 ways as a sum of consecutive naturals, for example, 11726464314 + ... + 11726464337.

It is an arithmetic number, because the mean of its divisors is an integer number (54723500188).

Almost surely, 2^281435143812 is an apocalyptic number.

It is an amenable number.

281435143812 is an abundant number, since it is smaller than the sum of its proper divisors (375246858444).

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

281435143812 is a wasteful number, since it uses less digits than its factorization.

281435143812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23452928658 (or 23452928656 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

Adding to 281435143812 its reverse (218341534182), we get a palindrome (499776677994).

The spelling of 281435143812 in words is "two hundred eighty-one billion, four hundred thirty-five million, one hundred forty-three thousand, eight hundred twelve".