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5521221 = 32613469
BaseRepresentation
bin10101000011111101000101
3101101111200200
4111003331011
52403134341
6314201113
764633566
oct25037505
911344620
105521221
1131311a2
121a23199
1311b40c4
14a3a16d
15740db6
hex543f45

5521221 has 6 divisors (see below), whose sum is σ = 7975110. Its totient is φ = 3680808.

The previous prime is 5521213. The next prime is 5521249. The reversal of 5521221 is 1221255.

It can be written as a sum of positive squares in only one way, i.e., 3802500 + 1718721 = 1950^2 + 1311^2 .

It is not a de Polignac number, because 5521221 - 23 = 5521213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5521194 and 5521203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5521211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 306726 + ... + 306743.

It is an arithmetic number, because the mean of its divisors is an integer number (1329185).

Almost surely, 25521221 is an apocalyptic number.

It is an amenable number.

5521221 is a deficient number, since it is larger than the sum of its proper divisors (2453889).

5521221 is a wasteful number, since it uses less digits than its factorization.

5521221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613475 (or 613472 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 5521221 is about 2349.7278565825. The cubic root of 5521221 is about 176.7441482057.

Adding to 5521221 its reverse (1221255), we get a palindrome (6742476).

The spelling of 5521221 in words is "five million, five hundred twenty-one thousand, two hundred twenty-one".

Divisors: 1 3 9 613469 1840407 5521221