2201956 has 6 divisors (see below), whose sum is σ = 3853430. Its totient is φ = 1100976.

The previous prime is 2201933. The next prime is 2201957. The reversal of 2201956 is 6591022.

It can be written as a sum of positive squares in only one way, i.e., 1822500 + 379456 = 1350^2 + 616^2 .

It is a super-2 number, since 2×2201956² = 9697220451872, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2201956.

It is not an unprimeable number, because it can be changed into a prime (2201957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275241 + ... + 275248.

2^2201956 is an apocalyptic number.

2201956 is the 939-th centered pentagonal number.

It is an amenable number.

2201956 is a deficient number, since it is larger than the sum of its proper divisors (1651474).

2201956 is a wasteful number, since it uses less digits than its factorization.

2201956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550493 (or 550491 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2201956 is about 1483.8989183903. The cubic root of 2201956 is about 130.0976780686.

Adding to 2201956 its reverse (6591022), we get a palindrome (8792978).

The spelling of 2201956 in words is "two million, two hundred one thousand, nine hundred fifty-six".