51022021019 has 8 divisors (see below), whose sum is σ = 51494596608. Its totient is φ = 50550552360.

The previous prime is 51022021009. The next prime is 51022021027. The reversal of 51022021019 is 91012022015.

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 51022021019 - 2¹² = 51022016923 is a prime.

It is a super-2 number, since 2×51022021019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51022020985 and 51022021003.

It is not an unprimeable number, because it can be changed into a prime (51022021009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183977 + ... + 368634.

It is an arithmetic number, because the mean of its divisors is an integer number (6436824576).

Almost surely, 2^51022021019 is an apocalyptic number.

51022021019 is a deficient number, since it is larger than the sum of its proper divisors (472575589).

51022021019 is a wasteful number, since it uses less digits than its factorization.

51022021019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553465.

The product of its (nonzero) digits is 360, while the sum is 23.

The spelling of 51022021019 in words is "fifty-one billion, twenty-two million, twenty-one thousand, nineteen".