51451233413 has 2 divisors, whose sum is σ = 51451233414. Its totient is φ = 51451233412.

The previous prime is 51451233403. The next prime is 51451233481. The reversal of 51451233413 is 31433215415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51090917089 + 360316324 = 226033^2 + 18982^2 .

It is a cyclic number.

It is not a de Polignac number, because 51451233413 - 2⁶ = 51451233349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51451233413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51451233403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25725616706 + 25725616707.

It is an arithmetic number, because the mean of its divisors is an integer number (25725616707).

Almost surely, 2^51451233413 is an apocalyptic number.

It is an amenable number.

51451233413 is a deficient number, since it is larger than the sum of its proper divisors (1).

51451233413 is an equidigital number, since it uses as much as digits as its factorization.

51451233413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

Adding to 51451233413 its reverse (31433215415), we get a palindrome (82884448828).

The spelling of 51451233413 in words is "fifty-one billion, four hundred fifty-one million, two hundred thirty-three thousand, four hundred thirteen".