51344521 has 4 divisors (see below), whose sum is σ = 51363844. Its totient is φ = 51325200.

The previous prime is 51344459. The next prime is 51344551. The reversal of 51344521 is 12544315.

It is a happy number.

51344521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11148921 + 40195600 = 3339^2 + 6340^2 .

It is a cyclic number.

It is not a de Polignac number, because 51344521 - 2⁷ = 51344393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51344551) 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 3 ways as a sum of consecutive naturals, for example, 4890 + ... + 11251.

It is an arithmetic number, because the mean of its divisors is an integer number (12840961).

Almost surely, 2^51344521 is an apocalyptic number.

It is an amenable number.

51344521 is a deficient number, since it is larger than the sum of its proper divisors (19323).

51344521 is a wasteful number, since it uses less digits than its factorization.

51344521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19322.

The product of its digits is 2400, while the sum is 25.

The square root of 51344521 is about 7165.5091235724. The cubic root of 51344521 is about 371.6761571530.

Adding to 51344521 its reverse (12544315), we get a palindrome (63888836).

The spelling of 51344521 in words is "fifty-one million, three hundred forty-four thousand, five hundred twenty-one".