2201551 has 16 divisors (see below), whose sum is σ = 2598048. Its totient is φ = 1843200.

The previous prime is 2201543. The next prime is 2201581. The reversal of 2201551 is 1551022.

It is a 13-Lehmer number, since φ(2201551) divides (2201551-1)¹³.

It is a cyclic number.

It is not a de Polignac number, because 2201551 - 2³ = 2201543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11311 + ... + 11503.

It is an arithmetic number, because the mean of its divisors is an integer number (162378).

2^2201551 is an apocalyptic number.

2201551 is a deficient number, since it is larger than the sum of its proper divisors (396497).

2201551 is a wasteful number, since it uses less digits than its factorization.

2201551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2201551 is about 1483.7624472940. The cubic root of 2201551 is about 130.0897014044.

Adding to 2201551 its reverse (1551022), we get a palindrome (3752573).

It can be divided in two parts, 220 and 1551, that added together give a palindrome (1771).

The spelling of 2201551 in words is "two million, two hundred one thousand, five hundred fifty-one".