2777231 has 2 divisors, whose sum is σ = 2777232. Its totient is φ = 2777230.

The previous prime is 2777219. The next prime is 2777233. The reversal of 2777231 is 1327772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2777231 - 2¹⁴ = 2760847 is a prime.

It is a super-2 number, since 2×2777231² = 15426024054722, which contains 22 as substring.

Together with 2777233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2777194 and 2777203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2777233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388615 + 1388616.

It is an arithmetic number, because the mean of its divisors is an integer number (1388616).

2^2777231 is an apocalyptic number.

2777231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2777231 is an equidigital number, since it uses as much as digits as its factorization.

2777231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4116, while the sum is 29.

The square root of 2777231 is about 1666.5026252605. The cubic root of 2777231 is about 140.5628868736.

The spelling of 2777231 in words is "two million, seven hundred seventy-seven thousand, two hundred thirty-one".