281260128131 has 4 divisors (see below), whose sum is σ = 281308303200. Its totient is φ = 281211953064.

The previous prime is 281260128077. The next prime is 281260128143. The reversal of 281260128131 is 131821062182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131821062182 = 2 ⋅65910531091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281260128131 is a prime.

It is a super-2 number, since 2×281260128131² (a number of 24 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 = 281260128091 and 281260128100.

It is not an unprimeable number, because it can be changed into a prime (281260128181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24078776 + ... + 24090453.

It is an arithmetic number, because the mean of its divisors is an integer number (70327075800).

Almost surely, 2^281260128131 is an apocalyptic number.

281260128131 is a deficient number, since it is larger than the sum of its proper divisors (48175069).

281260128131 is an equidigital number, since it uses as much as digits as its factorization.

281260128131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48175068.

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 281260128131 in words is "two hundred eighty-one billion, two hundred sixty million, one hundred twenty-eight thousand, one hundred thirty-one".