51213483413 has 2 divisors, whose sum is σ = 51213483414. Its totient is φ = 51213483412.

The previous prime is 51213483407. The next prime is 51213483421. The reversal of 51213483413 is 31438431215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39385180849 + 11828302564 = 198457^2 + 108758^2 .

It is a cyclic number.

It is not a de Polignac number, because 51213483413 - 2²⁶ = 51146374549 is a prime.

It is a super-2 number, since 2×51213483413² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51213483463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25606741706 + 25606741707.

It is an arithmetic number, because the mean of its divisors is an integer number (25606741707).

Almost surely, 2^51213483413 is an apocalyptic number.

It is an amenable number.

51213483413 is a deficient number, since it is larger than the sum of its proper divisors (1).

51213483413 is an equidigital number, since it uses as much as digits as its factorization.

51213483413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 35.

The spelling of 51213483413 in words is "fifty-one billion, two hundred thirteen million, four hundred eighty-three thousand, four hundred thirteen".