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6620131 = 7945733
BaseRepresentation
bin11001010000001111100011
3110110100010001
4121100033203
53143321011
6353520431
7110161450
oct31201743
913410101
106620131
113811891
122273117
1314aa34b
14c44827
158ab7c1
hex6503e3

6620131 has 4 divisors (see below), whose sum is σ = 7565872. Its totient is φ = 5674392.

The previous prime is 6620101. The next prime is 6620171. The reversal of 6620131 is 1310266.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-6620131 is a prime.

It is a super-2 number, since 2×66201312 = 87652268914322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6620099 and 6620108.

It is not an unprimeable number, because it can be changed into a prime (6620101) 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, 472860 + ... + 472873.

It is an arithmetic number, because the mean of its divisors is an integer number (1891468).

Almost surely, 26620131 is an apocalyptic number.

6620131 is the 1486-th hex number.

6620131 is a deficient number, since it is larger than the sum of its proper divisors (945741).

6620131 is an equidigital number, since it uses as much as digits as its factorization.

6620131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945740.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 6620131 is about 2572.9615232257. The cubic root of 6620131 is about 187.7682654778.

Adding to 6620131 its reverse (1310266), we get a palindrome (7930397).

The spelling of 6620131 in words is "six million, six hundred twenty thousand, one hundred thirty-one".

Divisors: 1 7 945733 6620131