51021104019 has 8 divisors (see below), whose sum is σ = 68034892752. Its totient is φ = 34010692320.

The previous prime is 51021104003. The next prime is 51021104023. The reversal of 51021104019 is 91040112015.

It is a happy number.

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

It is not a de Polignac number, because 51021104019 - 2⁴ = 51021104003 is a prime.

It is a super-2 number, since 2×51021104019² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51021104019.

It is not an unprimeable number, because it can be changed into a prime (51021100019) 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, 808792 + ... + 869589.

It is an arithmetic number, because the mean of its divisors is an integer number (8504361594).

Almost surely, 2^51021104019 is an apocalyptic number.

51021104019 is a deficient number, since it is larger than the sum of its proper divisors (17013788733).

51021104019 is a wasteful number, since it uses less digits than its factorization.

51021104019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688517.

The product of its (nonzero) digits is 360, while the sum is 24.

The spelling of 51021104019 in words is "fifty-one billion, twenty-one million, one hundred four thousand, nineteen".