51906000019 has 4 divisors (see below), whose sum is σ = 51918938496. Its totient is φ = 51893061544.

The previous prime is 51905999993. The next prime is 51906000031. The reversal of 51906000019 is 91000060915.

51906000019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51906000019 - 2²³ = 51897611411 is a prime.

It is a super-2 number, since 2×51906000019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51906000049) 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, 6463219 + ... + 6471244.

It is an arithmetic number, because the mean of its divisors is an integer number (12979734624).

Almost surely, 2^51906000019 is an apocalyptic number.

51906000019 is a deficient number, since it is larger than the sum of its proper divisors (12938477).

51906000019 is a wasteful number, since it uses less digits than its factorization.

51906000019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12938476.

The product of its (nonzero) digits is 2430, while the sum is 31.

The spelling of 51906000019 in words is "fifty-one billion, nine hundred six million, nineteen", and thus it is an aban number.