51204124151161 has 4 divisors (see below), whose sum is σ = 51204471678324. Its totient is φ = 51203776624000.

The previous prime is 51204124151111. The next prime is 51204124151179. The reversal of 51204124151161 is 16115142140215.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24802202792761 + 26401921358400 = 4980181^2 + 5138280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51204124151161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51204124151111) 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, 173542480 + ... + 173837281.

It is an arithmetic number, because the mean of its divisors is an integer number (12801117919581).

Almost surely, 2^{51204124151161} is an apocalyptic number.

It is an amenable number.

51204124151161 is a deficient number, since it is larger than the sum of its proper divisors (347527163).

51204124151161 is a wasteful number, since it uses less digits than its factorization.

51204124151161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347527162.

The product of its (nonzero) digits is 9600, while the sum is 34.

Adding to 51204124151161 its reverse (16115142140215), we get a palindrome (67319266291376).

The spelling of 51204124151161 in words is "fifty-one trillion, two hundred four billion, one hundred twenty-four million, one hundred fifty-one thousand, one hundred sixty-one".