2091275281 has 16 divisors (see below), whose sum is σ = 2248646400. Its totient is φ = 1937864448.

The previous prime is 2091275243. The next prime is 2091275297. The reversal of 2091275281 is 1825721902.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2091275281 is a prime.

It is a super-2 number, since 2×2091275281² = 8746864601843257922, which contains 22 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 2091275281.

It is not an unprimeable number, because it can be changed into a prime (2091275581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520426 + ... + 524428.

It is an arithmetic number, because the mean of its divisors is an integer number (140540400).

Almost surely, 2^2091275281 is an apocalyptic number.

It is an amenable number.

2091275281 is a deficient number, since it is larger than the sum of its proper divisors (157371119).

2091275281 is a wasteful number, since it uses less digits than its factorization.

2091275281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4488.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 2091275281 is about 45730.4633805519. The cubic root of 2091275281 is about 1278.8032599114.

The spelling of 2091275281 in words is "two billion, ninety-one million, two hundred seventy-five thousand, two hundred eighty-one".