51543102011 has 4 divisors (see below), whose sum is σ = 51543906624. Its totient is φ = 51542297400.

The previous prime is 51543102001. The next prime is 51543102031. The reversal of 51543102011 is 11020134515.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51543102011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51543102001) 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, 297035 + ... + 437396.

It is an arithmetic number, because the mean of its divisors is an integer number (12885976656).

Almost surely, 2^51543102011 is an apocalyptic number.

51543102011 is a deficient number, since it is larger than the sum of its proper divisors (804613).

51543102011 is an equidigital number, since it uses as much as digits as its factorization.

51543102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804612.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 51543102011 its reverse (11020134515), we get a palindrome (62563236526).

The spelling of 51543102011 in words is "fifty-one billion, five hundred forty-three million, one hundred two thousand, eleven".