51452521 has 4 divisors (see below), whose sum is σ = 51471952. Its totient is φ = 51433092.

The previous prime is 51452503. The next prime is 51452537. The reversal of 51452521 is 12525415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51452521 - 2⁷ = 51452393 is a prime.

It is a super-3 number, since 3×51452521³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51402521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4971 + ... + 11296.

It is an arithmetic number, because the mean of its divisors is an integer number (12867988).

Almost surely, 2^51452521 is an apocalyptic number.

It is an amenable number.

51452521 is a deficient number, since it is larger than the sum of its proper divisors (19431).

51452521 is a wasteful number, since it uses less digits than its factorization.

51452521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19430.

The product of its digits is 2000, while the sum is 25.

The square root of 51452521 is about 7173.0412657394. The cubic root of 51452521 is about 371.9365738590.

Adding to 51452521 its reverse (12525415), we get a palindrome (63977936).

It can be divided in two parts, 514 and 52521, that added together give a palindrome (53035).

The spelling of 51452521 in words is "fifty-one million, four hundred fifty-two thousand, five hundred twenty-one".