51002145451 has 8 divisors (see below), whose sum is σ = 54058134240. Its totient is φ = 47952363648.

The previous prime is 51002145427. The next prime is 51002145487. The reversal of 51002145451 is 15454120015.

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 51002145451 - 2²¹ = 51000048299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51002145251) 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, 1534816 + ... + 1567693.

It is an arithmetic number, because the mean of its divisors is an integer number (6757266780).

Almost surely, 2^51002145451 is an apocalyptic number.

51002145451 is a deficient number, since it is larger than the sum of its proper divisors (3055988789).

51002145451 is a wasteful number, since it uses less digits than its factorization.

51002145451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103493.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 51002145451 its reverse (15454120015), we get a palindrome (66456265466).

The spelling of 51002145451 in words is "fifty-one billion, two million, one hundred forty-five thousand, four hundred fifty-one".