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3220145861 is a prime number
BaseRepresentation
bin1011111111101111…
…1000011011000101
322022102021100200112
42333323320123011
523043324131421
61251310522405
7142540534232
oct27773703305
98272240615
103220145861
111402763279
1275a506405
133c41a346a
14227950789
1513ca7c45b
hexbfef86c5

3220145861 has 2 divisors, whose sum is σ = 3220145862. Its totient is φ = 3220145860.

The previous prime is 3220145849. The next prime is 3220145869. The reversal of 3220145861 is 1685410223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2869744900 + 350400961 = 53570^2 + 18719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-3220145861 is a prime.

It is a super-2 number, since 2×32201458612 = 20738678732230862642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3220145869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610072930 + 1610072931.

It is an arithmetic number, because the mean of its divisors is an integer number (1610072931).

Almost surely, 23220145861 is an apocalyptic number.

It is an amenable number.

3220145861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3220145861 is an equidigital number, since it uses as much as digits as its factorization.

3220145861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 3220145861 is about 56746.3290530762. The cubic root of 3220145861 is about 1476.6985486433.

The spelling of 3220145861 in words is "three billion, two hundred twenty million, one hundred forty-five thousand, eight hundred sixty-one".