51450021441 has 48 divisors (see below), whose sum is σ = 94417290240. Its totient is φ = 26263025280.

The previous prime is 51450021439. The next prime is 51450021449. The reversal of 51450021441 is 14412005415.

51450021441 is a `hidden beast` number, since 5 + 14 + 500 + 2 + 144 + 1 = 666.

It is not a de Polignac number, because 51450021441 - 2¹ = 51450021439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51450021449) 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 47 ways as a sum of consecutive naturals, for example, 987846 + ... + 1038623.

It is an arithmetic number, because the mean of its divisors is an integer number (1967026880).

Almost surely, 2^51450021441 is an apocalyptic number.

It is an amenable number.

51450021441 is a deficient number, since it is larger than the sum of its proper divisors (42967268799).

51450021441 is a wasteful number, since it uses less digits than its factorization.

51450021441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026526 (or 2026523 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 51450021441 its reverse (14412005415), we get a palindrome (65862026856).

The spelling of 51450021441 in words is "fifty-one billion, four hundred fifty million, twenty-one thousand, four hundred forty-one".