Search a number
-
+
2152221 = 32333079
BaseRepresentation
bin1000001101011100011101
311001100021220
420031130131
51022332341
6114043553
724202461
oct10153435
94040256
102152221
11123aaa5
128795b9
135a4806
144004a1
152c7a66
hex20d71d

2152221 has 8 divisors (see below), whose sum is σ = 2882880. Its totient is φ = 1428192.

The previous prime is 2152219. The next prime is 2152229. The reversal of 2152221 is 1222512.

2152221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2152221 - 21 = 2152219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2152221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152229) 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 7 ways as a sum of consecutive naturals, for example, 841 + ... + 2238.

It is an arithmetic number, because the mean of its divisors is an integer number (360360).

22152221 is an apocalyptic number.

It is an amenable number.

2152221 is a deficient number, since it is larger than the sum of its proper divisors (730659).

2152221 is a wasteful number, since it uses less digits than its factorization.

2152221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315.

The product of its digits is 80, while the sum is 15.

The square root of 2152221 is about 1467.0449890852. The cubic root of 2152221 is about 129.1107155984.

Adding to 2152221 its reverse (1222512), we get a palindrome (3374733).

The spelling of 2152221 in words is "two million, one hundred fifty-two thousand, two hundred twenty-one".

Divisors: 1 3 233 699 3079 9237 717407 2152221