2278931 has 4 divisors (see below), whose sum is σ = 2306472. Its totient is φ = 2251392.

The previous prime is 2278891. The next prime is 2278943. The reversal of 2278931 is 1398722.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2278931 - 2¹⁰ = 2277907 is a prime.

It is a super-2 number, since 2×2278931² = 10387053005522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2278961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13646 + ... + 13811.

It is an arithmetic number, because the mean of its divisors is an integer number (576618).

2^2278931 is an apocalyptic number.

2278931 is a deficient number, since it is larger than the sum of its proper divisors (27541).

2278931 is an equidigital number, since it uses as much as digits as its factorization.

2278931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27540.

The product of its digits is 6048, while the sum is 32.

The square root of 2278931 is about 1509.6128642801. The cubic root of 2278931 is about 131.5963141400.

The spelling of 2278931 in words is "two million, two hundred seventy-eight thousand, nine hundred thirty-one".