51247466719 has 4 divisors (see below), whose sum is σ = 51260241096. Its totient is φ = 51234692344.

The previous prime is 51247466707. The next prime is 51247466723. The reversal of 51247466719 is 91766474215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51247466719 - 2⁵ = 51247466687 is a prime.

It is a super-2 number, since 2×51247466719² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51247466749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6381169 + ... + 6389194.

It is an arithmetic number, because the mean of its divisors is an integer number (12815060274).

Almost surely, 2^51247466719 is an apocalyptic number.

51247466719 is a deficient number, since it is larger than the sum of its proper divisors (12774377).

51247466719 is a wasteful number, since it uses less digits than its factorization.

51247466719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12774376.

The product of its digits is 2540160, while the sum is 52.

The spelling of 51247466719 in words is "fifty-one billion, two hundred forty-seven million, four hundred sixty-six thousand, seven hundred nineteen".