2291956 has 12 divisors (see below), whose sum is σ = 4050592. Its totient is φ = 1134648.

The previous prime is 2291929. The next prime is 2291959. The reversal of 2291956 is 6591922.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291959) 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, 2370 + ... + 3193.

2^2291956 is an apocalyptic number.

It is an amenable number.

2291956 is a deficient number, since it is larger than the sum of its proper divisors (1758636).

2291956 is a wasteful number, since it uses less digits than its factorization.

2291956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5670 (or 5668 counting only the distinct ones).

The product of its digits is 9720, while the sum is 34.

The square root of 2291956 is about 1513.9207376874. The cubic root of 2291956 is about 131.8465464994.

Subtracting from 2291956 its sum of digits (34), we obtain a palindrome (2291922).

The spelling of 2291956 in words is "two million, two hundred ninety-one thousand, nine hundred fifty-six".