51543335401 has 8 divisors (see below), whose sum is σ = 51765136808. Its totient is φ = 51321600000.

The previous prime is 51543335399. The next prime is 51543335411. The reversal of 51543335401 is 10453334515.

It can be written as a sum of positive squares in 4 ways, for example, as 7013895001 + 44529440400 = 83749^2 + 211020^2 .

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 51543335401 - 2¹ = 51543335399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51543335411) 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, 2157361 + ... + 2181121.

It is an arithmetic number, because the mean of its divisors is an integer number (6470642101).

Almost surely, 2^51543335401 is an apocalyptic number.

It is an amenable number.

51543335401 is a deficient number, since it is larger than the sum of its proper divisors (221801407).

51543335401 is a wasteful number, since it uses less digits than its factorization.

51543335401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33003.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 51543335401 its reverse (10453334515), we get a palindrome (61996669916).

The spelling of 51543335401 in words is "fifty-one billion, five hundred forty-three million, three hundred thirty-five thousand, four hundred one".