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4221511421 is a prime number
BaseRepresentation
bin1111101110011111…
…0010011011111101
3101220012111222222212
43323213302123331
532121201331141
61534521350205
7206420153321
oct37347623375
911805458885
104221511421
111876a2a016
12999938365
1352379b06a
142c0935981
1519a92d2eb
hexfb9f26fd

4221511421 has 2 divisors, whose sum is σ = 4221511422. Its totient is φ = 4221511420.

The previous prime is 4221511391. The next prime is 4221511499. The reversal of 4221511421 is 1241151224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3970764196 + 250747225 = 63014^2 + 15835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-4221511421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221541421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110755710 + 2110755711.

It is an arithmetic number, because the mean of its divisors is an integer number (2110755711).

Almost surely, 24221511421 is an apocalyptic number.

It is an amenable number.

4221511421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221511421 is an equidigital number, since it uses as much as digits as its factorization.

4221511421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640, while the sum is 23.

The square root of 4221511421 is about 64973.1592351796. The cubic root of 4221511421 is about 1616.1784918120.

Adding to 4221511421 its reverse (1241151224), we get a palindrome (5462662645).

The spelling of 4221511421 in words is "four billion, two hundred twenty-one million, five hundred eleven thousand, four hundred twenty-one".