51236472217 has 8 divisors (see below), whose sum is σ = 58631726016. Its totient is φ = 43860157872.

The previous prime is 51236472191. The next prime is 51236472239. The reversal of 51236472217 is 71227463215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51236472217 - 2¹⁹ = 51235947929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51236472217.

It is not an unprimeable number, because it can be changed into a prime (51236472257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4729063 + ... + 4739884.

It is an arithmetic number, because the mean of its divisors is an integer number (7328965752).

Almost surely, 2^51236472217 is an apocalyptic number.

It is an amenable number.

51236472217 is a deficient number, since it is larger than the sum of its proper divisors (7395253799).

51236472217 is an equidigital number, since it uses as much as digits as its factorization.

51236472217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9469727.

The product of its digits is 141120, while the sum is 40.

The spelling of 51236472217 in words is "fifty-one billion, two hundred thirty-six million, four hundred seventy-two thousand, two hundred seventeen".