51364643 has 8 divisors (see below), whose sum is σ = 56194560. Its totient is φ = 46561480.

The previous prime is 51364639. The next prime is 51364739. The reversal of 51364643 is 34646315.

51364643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51364643 - 2² = 51364639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51360643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2555 + ... + 10452.

It is an arithmetic number, because the mean of its divisors is an integer number (7024320).

Almost surely, 2^51364643 is an apocalyptic number.

51364643 is a deficient number, since it is larger than the sum of its proper divisors (4829917).

51364643 is a wasteful number, since it uses less digits than its factorization.

51364643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13377.

The product of its digits is 25920, while the sum is 32.

The square root of 51364643 is about 7166.9130732834. The cubic root of 51364643 is about 371.7247043053.

It can be divided in two parts, 5136 and 4643, that added together give a palindrome (9779).

The spelling of 51364643 in words is "fifty-one million, three hundred sixty-four thousand, six hundred forty-three".