51542134201 has 2 divisors, whose sum is σ = 51542134202. Its totient is φ = 51542134200.

The previous prime is 51542134181. The next prime is 51542134249. The reversal of 51542134201 is 10243124515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49240053801 + 2302080400 = 221901^2 + 47980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51542134201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51542134201.

It is not a weakly prime, because it can be changed into another prime (51542134001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25771067100 + 25771067101.

It is an arithmetic number, because the mean of its divisors is an integer number (25771067101).

Almost surely, 2^51542134201 is an apocalyptic number.

It is an amenable number.

51542134201 is a deficient number, since it is larger than the sum of its proper divisors (1).

51542134201 is an equidigital number, since it uses as much as digits as its factorization.

51542134201 is an evil number, because the sum of its binary digits is even.

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

Adding to 51542134201 its reverse (10243124515), we get a palindrome (61785258716).

The spelling of 51542134201 in words is "fifty-one billion, five hundred forty-two million, one hundred thirty-four thousand, two hundred one".