2131996 has 6 divisors (see below), whose sum is σ = 3731000. Its totient is φ = 1065996.

The previous prime is 2131991. The next prime is 2132003. The reversal of 2131996 is 6991312.

It is an Ulam number.

It is a plaindrome in base 11.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266496 + ... + 266503.

2^2131996 is an apocalyptic number.

It is an amenable number.

2131996 is a deficient number, since it is larger than the sum of its proper divisors (1599004).

2131996 is a wasteful number, since it uses less digits than its factorization.

2131996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533003 (or 533001 counting only the distinct ones).

The product of its digits is 2916, while the sum is 31.

The square root of 2131996 is about 1460.1356101404. The cubic root of 2131996 is about 128.7050127175.

It can be divided in two parts, 213 and 1996, that added together give a square (2209 = 47²).

The spelling of 2131996 in words is "two million, one hundred thirty-one thousand, nine hundred ninety-six".