51340641 has 16 divisors (see below), whose sum is σ = 78608640. Its totient is φ = 29477520.

The previous prime is 51340637. The next prime is 51340649. The reversal of 51340641 is 14604315.

51340641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51340641 - 2² = 51340637 is a prime.

It is a super-2 number, since 2×51340641² = 5271722836581762, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51340649) 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 15 ways as a sum of consecutive naturals, for example, 40315 + ... + 41568.

It is an arithmetic number, because the mean of its divisors is an integer number (4913040).

Almost surely, 2^51340641 is an apocalyptic number.

It is an amenable number.

51340641 is a deficient number, since it is larger than the sum of its proper divisors (27267999).

51340641 is a wasteful number, since it uses less digits than its factorization.

51340641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81916.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 51340641 is about 7165.2383770535. The cubic root of 51340641 is about 371.6667946492. Note that the first 3 decimals are identical.

Adding to 51340641 its reverse (14604315), we get a palindrome (65944956).

The spelling of 51340641 in words is "fifty-one million, three hundred forty thousand, six hundred forty-one".