51021232279 has 2 divisors, whose sum is σ = 51021232280. Its totient is φ = 51021232278.

The previous prime is 51021232271. The next prime is 51021232313. The reversal of 51021232279 is 97223212015.

51021232279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (51021232313) can be obtained adding 51021232279 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51021232279 - 2³ = 51021232271 is a prime.

It is a super-3 number, since 3×51021232279³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51021232271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25510616139 + 25510616140.

It is an arithmetic number, because the mean of its divisors is an integer number (25510616140).

Almost surely, 2^51021232279 is an apocalyptic number.

51021232279 is a deficient number, since it is larger than the sum of its proper divisors (1).

51021232279 is an equidigital number, since it uses as much as digits as its factorization.

51021232279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 51021232279 in words is "fifty-one billion, twenty-one million, two hundred thirty-two thousand, two hundred seventy-nine".