51434205211 has 4 divisors (see below), whose sum is σ = 54459746712. Its totient is φ = 48408663712.

The previous prime is 51434205209. The next prime is 51434205217. The reversal of 51434205211 is 11250243415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51434205211 - 2¹ = 51434205209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51434205211.

It is not an unprimeable number, because it can be changed into a prime (51434205217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1512770725 + ... + 1512770758.

It is an arithmetic number, because the mean of its divisors is an integer number (13614936678).

Almost surely, 2^51434205211 is an apocalyptic number.

51434205211 is a deficient number, since it is larger than the sum of its proper divisors (3025541501).

51434205211 is a wasteful number, since it uses less digits than its factorization.

51434205211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025541500.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 51434205211 its reverse (11250243415), we get a palindrome (62684448626).

The spelling of 51434205211 in words is "fifty-one billion, four hundred thirty-four million, two hundred five thousand, two hundred eleven".