51240413 has 8 divisors (see below), whose sum is σ = 58643520. Its totient is φ = 43858080.

The previous prime is 51240407. The next prime is 51240433. The reversal of 51240413 is 31404215.

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

It is not a de Polignac number, because 51240413 - 2⁶ = 51240349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51240433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518 + ... + 10136.

It is an arithmetic number, because the mean of its divisors is an integer number (7330440).

Almost surely, 2^51240413 is an apocalyptic number.

It is an amenable number.

51240413 is a deficient number, since it is larger than the sum of its proper divisors (7403107).

51240413 is an equidigital number, since it uses as much as digits as its factorization.

51240413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10387.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 51240413 is about 7158.2409151970. The cubic root of 51240413 is about 371.4247791878.

Adding to 51240413 its reverse (31404215), we get a palindrome (82644628).

The spelling of 51240413 in words is "fifty-one million, two hundred forty thousand, four hundred thirteen".