51321331054501 has 24 divisors (see below), whose sum is σ = 55524558737760. Its totient is φ = 47303952696000.

The previous prime is 51321331054451. The next prime is 51321331054519. The reversal of 51321331054501 is 10545013312315.

It is not a de Polignac number, because 51321331054501 - 2⁷ = 51321331054373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51321331054561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 901278691 + ... + 901335631.

It is an arithmetic number, because the mean of its divisors is an integer number (2313523280740).

Almost surely, 2^{51321331054501} is an apocalyptic number.

It is an amenable number.

51321331054501 is a deficient number, since it is larger than the sum of its proper divisors (4203227683259).

51321331054501 is a wasteful number, since it uses less digits than its factorization.

51321331054501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91685 (or 91648 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

Adding to 51321331054501 its reverse (10545013312315), we get a palindrome (61866344366816).

The spelling of 51321331054501 in words is "fifty-one trillion, three hundred twenty-one billion, three hundred thirty-one million, fifty-four thousand, five hundred one".