51233747419 has 4 divisors (see below), whose sum is σ = 51236531896. Its totient is φ = 51230962944.

The previous prime is 51233747413. The next prime is 51233747423. The reversal of 51233747419 is 91474733215.

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

It is a 8-Lehmer number, since φ(51233747419) divides (51233747419-1)⁸.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51233747419 is a prime.

It is a super-2 number, since 2×51233747419² (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 (51233747413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1364454 + ... + 1401499.

It is an arithmetic number, because the mean of its divisors is an integer number (12809132974).

Almost surely, 2^51233747419 is an apocalyptic number.

51233747419 is the 130683-rd hex number.

51233747419 is a deficient number, since it is larger than the sum of its proper divisors (2784477).

51233747419 is a wasteful number, since it uses less digits than its factorization.

51233747419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784476.

The product of its digits is 635040, while the sum is 46.

The spelling of 51233747419 in words is "fifty-one billion, two hundred thirty-three million, seven hundred forty-seven thousand, four hundred nineteen".