51274421217 has 12 divisors (see below), whose sum is σ = 74084484864. Its totient is φ = 34173055800.

The previous prime is 51274421207. The next prime is 51274421221. The reversal of 51274421217 is 71212447215.

51274421217 is a `hidden beast` number, since 5 + 12 + 7 + 4 + 421 + 217 = 666.

51274421217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51274421217 - 2¹¹ = 51274419169 is a prime.

It is a super-2 number, since 2×51274421217² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51274421207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 791409 + ... + 853742.

It is an arithmetic number, because the mean of its divisors is an integer number (6173707072).

Almost surely, 2^51274421217 is an apocalyptic number.

It is an amenable number.

51274421217 is a deficient number, since it is larger than the sum of its proper divisors (22810063647).

51274421217 is a wasteful number, since it uses less digits than its factorization.

51274421217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648620 (or 1648617 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The spelling of 51274421217 in words is "fifty-one billion, two hundred seventy-four million, four hundred twenty-one thousand, two hundred seventeen".