51360643 has 2 divisors, whose sum is σ = 51360644. Its totient is φ = 51360642.

The previous prime is 51360637. The next prime is 51360677. The reversal of 51360643 is 34606315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51360643 - 2⁵ = 51360611 is a prime.

It is not a weakly prime, because it can be changed into another prime (51360623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25680321 + 25680322.

It is an arithmetic number, because the mean of its divisors is an integer number (25680322).

Almost surely, 2^51360643 is an apocalyptic number.

51360643 is a deficient number, since it is larger than the sum of its proper divisors (1).

51360643 is an equidigital number, since it uses as much as digits as its factorization.

51360643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 51360643 is about 7166.6340076775. The cubic root of 51360643 is about 371.7150547531.

Adding to 51360643 its reverse (34606315), we get a palindrome (85966958).

It can be divided in two parts, 51360 and 643, that added together give a triangular number (52003 = T₃₂₂).

The spelling of 51360643 in words is "fifty-one million, three hundred sixty thousand, six hundred forty-three".