51435400243 has 8 divisors (see below), whose sum is σ = 54478859040. Its totient is φ = 48393924480.

The previous prime is 51435400241. The next prime is 51435400259. The reversal of 51435400243 is 34200453415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51435400243 - 2¹ = 51435400241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51435400241) 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, 442183 + ... + 546256.

It is an arithmetic number, because the mean of its divisors is an integer number (6809857380).

Almost surely, 2^51435400243 is an apocalyptic number.

51435400243 is a deficient number, since it is larger than the sum of its proper divisors (3043458797).

51435400243 is a wasteful number, since it uses less digits than its factorization.

51435400243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991517.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 51435400243 its reverse (34200453415), we get a palindrome (85635853658).

The spelling of 51435400243 in words is "fifty-one billion, four hundred thirty-five million, four hundred thousand, two hundred forty-three".