2231156 has 6 divisors (see below), whose sum is σ = 3904530. Its totient is φ = 1115576.

The previous prime is 2231149. The next prime is 2231171. The reversal of 2231156 is 6511322.

It can be written as a sum of positive squares in only one way, i.e., 2202256 + 28900 = 1484^2 + 170^2 .

It is a super-3 number, since 3×2231156³ = 33320465876497933248, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278891 + ... + 278898.

It is an arithmetic number, because the mean of its divisors is an integer number (650755).

2^2231156 is an apocalyptic number.

It is an amenable number.

2231156 is a deficient number, since it is larger than the sum of its proper divisors (1673374).

2231156 is a wasteful number, since it uses less digits than its factorization.

2231156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557793 (or 557791 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 2231156 is about 1493.7054595870. The cubic root of 2231156 is about 130.6702270074.

Adding to 2231156 its reverse (6511322), we get a palindrome (8742478).

The spelling of 2231156 in words is "two million, two hundred thirty-one thousand, one hundred fifty-six".