2106553 has 4 divisors (see below), whose sum is σ = 2115828. Its totient is φ = 2097280.

The previous prime is 2106551. The next prime is 2106563. The reversal of 2106553 is 3556012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1447209 + 659344 = 1203^2 + 812^2 .

It is a cyclic number.

It is not a de Polignac number, because 2106553 - 2¹ = 2106551 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2106551) 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, 4288 + ... + 4753.

It is an arithmetic number, because the mean of its divisors is an integer number (528957).

2^2106553 is an apocalyptic number.

It is an amenable number.

2106553 is a deficient number, since it is larger than the sum of its proper divisors (9275).

2106553 is an equidigital number, since it uses as much as digits as its factorization.

2106553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9274.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 2106553 is about 1451.3969133218. The cubic root of 2106553 is about 128.1909787485.

The spelling of 2106553 in words is "two million, one hundred six thousand, five hundred fifty-three".