2278207 has 2 divisors, whose sum is σ = 2278208. Its totient is φ = 2278206.

The previous prime is 2278189. The next prime is 2278217. The reversal of 2278207 is 7028722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2278207 - 2⁷ = 2278079 is a prime.

2278207 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2278217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139103 + 1139104.

It is an arithmetic number, because the mean of its divisors is an integer number (1139104).

2^2278207 is an apocalyptic number.

2278207 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278207 is an equidigital number, since it uses as much as digits as its factorization.

2278207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 2278207 is about 1509.3730486530. The cubic root of 2278207 is about 131.5823769296.

It can be divided in two parts, 2278 and 207, that added together give a triangular number (2485 = T₇₀).

The spelling of 2278207 in words is "two million, two hundred seventy-eight thousand, two hundred seven".