28131281003 has 8 divisors (see below), whose sum is σ = 33842142720. Its totient is φ = 22843446120.

The previous prime is 28131280997. The next prime is 28131281027. The reversal of 28131281003 is 30018213182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28131281003 - 2⁶ = 28131280939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28131281033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105756563 + ... + 105756828.

It is an arithmetic number, because the mean of its divisors is an integer number (4230267840).

Almost surely, 2^28131281003 is an apocalyptic number.

28131281003 is a deficient number, since it is larger than the sum of its proper divisors (5710861717).

28131281003 is a wasteful number, since it uses less digits than its factorization.

28131281003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211513417.

The product of its (nonzero) digits is 2304, while the sum is 29.

Adding to 28131281003 its reverse (30018213182), we get a palindrome (58149494185).

The spelling of 28131281003 in words is "twenty-eight billion, one hundred thirty-one million, two hundred eighty-one thousand, three".