281118406051 has 4 divisors (see below), whose sum is σ = 321278178352. Its totient is φ = 240958633752.

The previous prime is 281118406021. The next prime is 281118406067. The reversal of 281118406051 is 150604811182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 281118406051 - 2¹⁹ = 281117881763 is a prime.

It is a super-3 number, since 3×281118406051³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 281118406051.

It is not an unprimeable number, because it can be changed into a prime (281118406021) 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, 20079886140 + ... + 20079886153.

It is an arithmetic number, because the mean of its divisors is an integer number (80319544588).

Almost surely, 2^281118406051 is an apocalyptic number.

281118406051 is a deficient number, since it is larger than the sum of its proper divisors (40159772301).

281118406051 is an equidigital number, since it uses as much as digits as its factorization.

281118406051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40159772300.

The product of its (nonzero) digits is 15360, while the sum is 37.

The spelling of 281118406051 in words is "two hundred eighty-one billion, one hundred eighteen million, four hundred six thousand, fifty-one".