4550051421 has 8 divisors (see below), whose sum is σ = 6740816960. Its totient is φ = 3033367596.

The previous prime is 4550051417. The next prime is 4550051461. The reversal of 4550051421 is 1241500554.

It is not a de Polignac number, because 4550051421 - 2² = 4550051417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 168520423 = 4550051421 / (4 + 5 + 5 + 0 + 0 + 5 + 1 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4550051461) 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, 84260185 + ... + 84260238.

It is an arithmetic number, because the mean of its divisors is an integer number (842602120).

Almost surely, 2^4550051421 is an apocalyptic number.

It is an amenable number.

4550051421 is a deficient number, since it is larger than the sum of its proper divisors (2190765539).

4550051421 is a wasteful number, since it uses less digits than its factorization.

4550051421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168520432 (or 168520426 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 4550051421 is about 67454.0689728944. The cubic root of 4550051421 is about 1657.0620386252.

Adding to 4550051421 its reverse (1241500554), we get a palindrome (5791551975).

The spelling of 4550051421 in words is "four billion, five hundred fifty million, fifty-one thousand, four hundred twenty-one".