51512255219 has 2 divisors, whose sum is σ = 51512255220. Its totient is φ = 51512255218.

The previous prime is 51512255209. The next prime is 51512255239. The reversal of 51512255219 is 91255221515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51512255219 - 2²⁴ = 51495478003 is a prime.

It is a super-2 number, since 2×51512255219² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (51512255209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25756127609 + 25756127610.

It is an arithmetic number, because the mean of its divisors is an integer number (25756127610).

Almost surely, 2^51512255219 is an apocalyptic number.

51512255219 is a deficient number, since it is larger than the sum of its proper divisors (1).

51512255219 is an equidigital number, since it uses as much as digits as its factorization.

51512255219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45000, while the sum is 38.

The spelling of 51512255219 in words is "fifty-one billion, five hundred twelve million, two hundred fifty-five thousand, two hundred nineteen".