2278197 has 6 divisors (see below), whose sum is σ = 3290742. Its totient is φ = 1518792.

The previous prime is 2278189. The next prime is 2278207. The reversal of 2278197 is 7918722.

It can be written as a sum of positive squares in only one way, i.e., 2056356 + 221841 = 1434^2 + 471^2 .

It is not a de Polignac number, because 2278197 - 2³ = 2278189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126558 + ... + 126575.

It is an arithmetic number, because the mean of its divisors is an integer number (548457).

2^2278197 is an apocalyptic number.

It is an amenable number.

2278197 is a deficient number, since it is larger than the sum of its proper divisors (1012545).

2278197 is a wasteful number, since it uses less digits than its factorization.

2278197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253139 (or 253136 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2278197 is about 1509.3697360157. The cubic root of 2278197 is about 131.5821844060.

The spelling of 2278197 in words is "two million, two hundred seventy-eight thousand, one hundred ninety-seven".