2775406021 has 8 divisors (see below), whose sum is σ = 2896732224. Its totient is φ = 2654134560.

The previous prime is 2775405979. The next prime is 2775406031. The reversal of 2775406021 is 1206045772.

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 2775406021 - 2¹¹ = 2775403973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2775406031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116305 + ... + 138121.

It is an arithmetic number, because the mean of its divisors is an integer number (362091528).

Almost surely, 2^2775406021 is an apocalyptic number.

It is an amenable number.

2775406021 is a deficient number, since it is larger than the sum of its proper divisors (121326203).

2775406021 is a wasteful number, since it uses less digits than its factorization.

2775406021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27371.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 2775406021 is about 52682.1224040945. The cubic root of 2775406021 is about 1405.3209114860.

The spelling of 2775406021 in words is "two billion, seven hundred seventy-five million, four hundred six thousand, twenty-one".