2100553 has 16 divisors (see below), whose sum is σ = 2653056. Its totient is φ = 1618560.

The previous prime is 2100551. The next prime is 2100559. The reversal of 2100553 is 3550012.

It is a cyclic number.

It is not a de Polignac number, because 2100553 - 2¹ = 2100551 is a prime.

2100553 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100551) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 3450 + ... + 4012.

It is an arithmetic number, because the mean of its divisors is an integer number (165816).

2^2100553 is an apocalyptic number.

It is an amenable number.

2100553 is a deficient number, since it is larger than the sum of its proper divisors (552503).

2100553 is a wasteful number, since it uses less digits than its factorization.

2100553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 2100553 is about 1449.3284651865. The cubic root of 2100553 is about 128.0691561516.

Adding to 2100553 its reverse (3550012), we get a palindrome (5650565).

The spelling of 2100553 in words is "two million, one hundred thousand, five hundred fifty-three".