Search a number
-
+
51443669 is a prime number
BaseRepresentation
bin1100010000111…
…1011111010101
310120210121110002
43010033133111
5101132144134
65034341045
71163156354
oct304173725
9116717402
1051443669
1127047432
121528a785
13a872554
146b9199b
1547b287e
hex310f7d5

51443669 has 2 divisors, whose sum is σ = 51443670. Its totient is φ = 51443668.

The previous prime is 51443633. The next prime is 51443671. The reversal of 51443669 is 96634415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26142769 + 25300900 = 5113^2 + 5030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-51443669 is a prime.

It is a super-2 number, since 2×514436692 = 5292902160363122, which contains 22 as substring.

Together with 51443671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51443629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25721834 + 25721835.

It is an arithmetic number, because the mean of its divisors is an integer number (25721835).

Almost surely, 251443669 is an apocalyptic number.

It is an amenable number.

51443669 is a deficient number, since it is larger than the sum of its proper divisors (1).

51443669 is an equidigital number, since it uses as much as digits as its factorization.

51443669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 51443669 is about 7172.4242066403. The cubic root of 51443669 is about 371.9152430521.

The spelling of 51443669 in words is "fifty-one million, four hundred forty-three thousand, six hundred sixty-nine".