2131156 has 6 divisors (see below), whose sum is σ = 3729530. Its totient is φ = 1065576.

The previous prime is 2131141. The next prime is 2131193. The reversal of 2131156 is 6511312.

It can be written as a sum of positive squares in only one way, i.e., 1522756 + 608400 = 1234^2 + 780^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266391 + ... + 266398.

2^2131156 is an apocalyptic number.

It is an amenable number.

2131156 is a deficient number, since it is larger than the sum of its proper divisors (1598374).

2131156 is a wasteful number, since it uses less digits than its factorization.

2131156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532793 (or 532791 counting only the distinct ones).

The product of its digits is 180, while the sum is 19.

The square root of 2131156 is about 1459.8479372866. The cubic root of 2131156 is about 128.6881073681.

Adding to 2131156 its reverse (6511312), we get a palindrome (8642468).

It can be divided in two parts, 213 and 1156, that added together give a square (1369 = 37²).

The spelling of 2131156 in words is "two million, one hundred thirty-one thousand, one hundred fifty-six".