51412421 has 2 divisors, whose sum is σ = 51412422. Its totient is φ = 51412420.

The previous prime is 51412411. The next prime is 51412433. The reversal of 51412421 is 12421415.

It is a happy number.

51412421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48804196 + 2608225 = 6986^2 + 1615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51412421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51412393 and 51412402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51412411) 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 as a sum of consecutive naturals, namely, 25706210 + 25706211.

It is an arithmetic number, because the mean of its divisors is an integer number (25706211).

Almost surely, 2^51412421 is an apocalyptic number.

It is an amenable number.

51412421 is a deficient number, since it is larger than the sum of its proper divisors (1).

51412421 is an equidigital number, since it uses as much as digits as its factorization.

51412421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320, while the sum is 20.

The square root of 51412421 is about 7170.2455327555. The cubic root of 51412421 is about 371.8399246724.

Adding to 51412421 its reverse (12421415), we get a palindrome (63833836).

The spelling of 51412421 in words is "fifty-one million, four hundred twelve thousand, four hundred twenty-one".