51441214421 has 2 divisors, whose sum is σ = 51441214422. Its totient is φ = 51441214420.

The previous prime is 51441214411. The next prime is 51441214471. The reversal of 51441214421 is 12441214415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49245823396 + 2195391025 = 221914^2 + 46855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51441214421 is a prime.

It is a super-2 number, since 2×51441214421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51441214411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25720607210 + 25720607211.

It is an arithmetic number, because the mean of its divisors is an integer number (25720607211).

Almost surely, 2^51441214421 is an apocalyptic number.

It is an amenable number.

51441214421 is a deficient number, since it is larger than the sum of its proper divisors (1).

51441214421 is an equidigital number, since it uses as much as digits as its factorization.

51441214421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5120, while the sum is 29.

Adding to 51441214421 its reverse (12441214415), we get a palindrome (63882428836).

The spelling of 51441214421 in words is "fifty-one billion, four hundred forty-one million, two hundred fourteen thousand, four hundred twenty-one".