51630121452353 has 4 divisors (see below), whose sum is σ = 51651482696580. Its totient is φ = 51608760208128.

The previous prime is 51630121452341. The next prime is 51630121452373. The reversal of 51630121452353 is 35325412103615.

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 40716037951744 + 10914083500609 = 6380912^2 + 3303647^2 .

It is a cyclic number.

It is not a de Polignac number, because 51630121452353 - 2¹⁰ = 51630121451329 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 51630121452353.

It is not an unprimeable number, because it can be changed into a prime (51630121452373) 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, 10680618488 + ... + 10680623321.

It is an arithmetic number, because the mean of its divisors is an integer number (12912870674145).

Almost surely, 2^{51630121452353} is an apocalyptic number.

It is an amenable number.

51630121452353 is a deficient number, since it is larger than the sum of its proper divisors (21361244227).

51630121452353 is a wasteful number, since it uses less digits than its factorization.

51630121452353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21361244226.

The product of its (nonzero) digits is 324000, while the sum is 41.

Adding to 51630121452353 its reverse (35325412103615), we get a palindrome (86955533555968).

The spelling of 51630121452353 in words is "fifty-one trillion, six hundred thirty billion, one hundred twenty-one million, four hundred fifty-two thousand, three hundred fifty-three".