2775231 has 6 divisors (see below), whose sum is σ = 4008680. Its totient is φ = 1850148.

The previous prime is 2775221. The next prime is 2775247. The reversal of 2775231 is 1325772.

It is not a de Polignac number, because 2775231 - 2⁷ = 2775103 is a prime.

It is a super-2 number, since 2×2775231² = 15403814206722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2775195 and 2775204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2775221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154171 + ... + 154188.

2^2775231 is an apocalyptic number.

2775231 is a deficient number, since it is larger than the sum of its proper divisors (1233449).

2775231 is a wasteful number, since it uses less digits than its factorization.

2775231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308365 (or 308362 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 2775231 is about 1665.9024581289. The cubic root of 2775231 is about 140.5291370362.

The spelling of 2775231 in words is "two million, seven hundred seventy-five thousand, two hundred thirty-one".