51313287779269 has 2 divisors, whose sum is σ = 51313287779270. Its totient is φ = 51313287779268.

The previous prime is 51313287779203. The next prime is 51313287779321. The reversal of 51313287779269 is 96297778231315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42828516922500 + 8484770856769 = 6544350^2 + 2912863^2 .

It is a cyclic number.

It is not a de Polignac number, because 51313287779269 - 2¹³ = 51313287771077 is a prime.

It is a super-2 number, since 2×51313287779269² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51313287779198 and 51313287779207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51313287771269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25656643889634 + 25656643889635.

It is an arithmetic number, because the mean of its divisors is an integer number (25656643889635).

Almost surely, 2^{51313287779269} is an apocalyptic number.

It is an amenable number.

51313287779269 is a deficient number, since it is larger than the sum of its proper divisors (1).

51313287779269 is an equidigital number, since it uses as much as digits as its factorization.

51313287779269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240045120, while the sum is 70.

The spelling of 51313287779269 in words is "fifty-one trillion, three hundred thirteen billion, two hundred eighty-seven million, seven hundred seventy-nine thousand, two hundred sixty-nine".