Search a number
-
+
2153021 = 13165617
BaseRepresentation
bin1000001101101000111101
311001101101112
420031220331
51022344041
6114051405
724205013
oct10155075
94041345
102153021
111240662
12879b65
135a4ca0
144008b3
152c7deb
hex20da3d

2153021 has 4 divisors (see below), whose sum is σ = 2318652. Its totient is φ = 1987392.

The previous prime is 2152973. The next prime is 2153051. The reversal of 2153021 is 1203512.

It is a happy number.

2153021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1240996 + 912025 = 1114^2 + 955^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153021 - 26 = 2152957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2152987 and 2153005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82796 + ... + 82821.

It is an arithmetic number, because the mean of its divisors is an integer number (579663).

22153021 is an apocalyptic number.

It is an amenable number.

2153021 is a deficient number, since it is larger than the sum of its proper divisors (165631).

2153021 is a wasteful number, since it uses less digits than its factorization.

2153021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165630.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2153021 is about 1467.3176206943. The cubic root of 2153021 is about 129.1267108234.

Adding to 2153021 its reverse (1203512), we get a palindrome (3356533).

The spelling of 2153021 in words is "two million, one hundred fifty-three thousand, twenty-one".

Divisors: 1 13 165617 2153021