51524413 has 4 divisors (see below), whose sum is σ = 52781148. Its totient is φ = 50267680.

The previous prime is 51524383. The next prime is 51524419. The reversal of 51524413 is 31442515.

It is a happy number.

51524413 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 2566404 + 48958009 = 1602^2 + 6997^2 .

It is a cyclic number.

It is not a de Polignac number, because 51524413 - 2¹³ = 51516221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51524419) 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, 628306 + ... + 628387.

It is an arithmetic number, because the mean of its divisors is an integer number (13195287).

Almost surely, 2^51524413 is an apocalyptic number.

It is an amenable number.

51524413 is a deficient number, since it is larger than the sum of its proper divisors (1256735).

51524413 is a wasteful number, since it uses less digits than its factorization.

51524413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256734.

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

The square root of 51524413 is about 7178.0507799820. The cubic root of 51524413 is about 372.1097226151.

Adding to 51524413 its reverse (31442515), we get a palindrome (82966928).

The spelling of 51524413 in words is "fifty-one million, five hundred twenty-four thousand, four hundred thirteen".