2231278 has 16 divisors (see below), whose sum is σ = 3907584. Its totient is φ = 935640.

The previous prime is 2231269. The next prime is 2231279. The reversal of 2231278 is 8721322.

2231278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×2231278³ = 33325932082071890856, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038 + ... + 2353.

It is an arithmetic number, because the mean of its divisors is an integer number (244224).

2^2231278 is an apocalyptic number.

2231278 is a deficient number, since it is larger than the sum of its proper divisors (1676306).

2231278 is a wasteful number, since it uses less digits than its factorization.

2231278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447.

The product of its digits is 1344, while the sum is 25.

The square root of 2231278 is about 1493.7462970665. The cubic root of 2231278 is about 130.6726086543.

The spelling of 2231278 in words is "two million, two hundred thirty-one thousand, two hundred seventy-eight".