51540212219 has 2 divisors, whose sum is σ = 51540212220. Its totient is φ = 51540212218.

The previous prime is 51540212203. The next prime is 51540212263. The reversal of 51540212219 is 91221204515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51540212219 - 2⁴ = 51540212203 is a prime.

It is a super-2 number, since 2×51540212219² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51540242219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25770106109 + 25770106110.

It is an arithmetic number, because the mean of its divisors is an integer number (25770106110).

Almost surely, 2^51540212219 is an apocalyptic number.

51540212219 is a deficient number, since it is larger than the sum of its proper divisors (1).

51540212219 is an equidigital number, since it uses as much as digits as its factorization.

51540212219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 51540212219 in words is "fifty-one billion, five hundred forty million, two hundred twelve thousand, two hundred nineteen".