51515301239 has 2 divisors, whose sum is σ = 51515301240. Its totient is φ = 51515301238.

The previous prime is 51515301221. The next prime is 51515301281. The reversal of 51515301239 is 93210351515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51515301239 - 2¹² = 51515297143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51515301199 and 51515301208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51515301209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25757650619 + 25757650620.

It is an arithmetic number, because the mean of its divisors is an integer number (25757650620).

Almost surely, 2^51515301239 is an apocalyptic number.

51515301239 is a deficient number, since it is larger than the sum of its proper divisors (1).

51515301239 is an equidigital number, since it uses as much as digits as its factorization.

51515301239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20250, while the sum is 35.

The spelling of 51515301239 in words is "fifty-one billion, five hundred fifteen million, three hundred one thousand, two hundred thirty-nine".