51216222261215 has 32 divisors (see below), whose sum is σ = 67230667526400. Its totient is φ = 37145973150720.

The previous prime is 51216222261203. The next prime is 51216222261247.

51216222261215 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51216222261215 - 2¹⁰ = 51216222260191 is a prime.

It is a super-3 number, since 3×51216222261215³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205886831 + ... + 206135439.

It is an arithmetic number, because the mean of its divisors is an integer number (2100958360200).

Almost surely, 2^{51216222261215} is an apocalyptic number.

51216222261215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51216222261215 is a deficient number, since it is larger than the sum of its proper divisors (16014445265185).

51216222261215 is a wasteful number, since it uses less digits than its factorization.

51216222261215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258887.

The product of its digits is 57600, while the sum is 38.

It can be divided in two parts, 5121622 and 2261215, that added together give a palindrome (7382837).

The spelling of 51216222261215 in words is "fifty-one trillion, two hundred sixteen billion, two hundred twenty-two million, two hundred sixty-one thousand, two hundred fifteen".