51022241421 has 4 divisors (see below), whose sum is σ = 68029655232. Its totient is φ = 34014827612.

The previous prime is 51022241419. The next prime is 51022241437. The reversal of 51022241421 is 12414222015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51022241421 - 2¹ = 51022241419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51022241391 and 51022241400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51022241411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8503706901 + ... + 8503706906.

It is an arithmetic number, because the mean of its divisors is an integer number (17007413808).

Almost surely, 2^51022241421 is an apocalyptic number.

It is an amenable number.

51022241421 is a deficient number, since it is larger than the sum of its proper divisors (17007413811).

51022241421 is a wasteful number, since it uses less digits than its factorization.

51022241421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17007413810.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 51022241421 its reverse (12414222015), we get a palindrome (63436463436).

The spelling of 51022241421 in words is "fifty-one billion, twenty-two million, two hundred forty-one thousand, four hundred twenty-one".