51630121452331 has 16 divisors (see below), whose sum is σ = 52438612091040. Its totient is φ = 50827667005440.

The previous prime is 51630121452281. The next prime is 51630121452341. The reversal of 51630121452331 is 13325412103615.

It is a cyclic number.

It is not a de Polignac number, because 51630121452331 - 2²¹ = 51630119355179 is a prime.

It is a super-2 number, since 2×51630121452331² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51630121452341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23821011 + ... + 25897891.

It is an arithmetic number, because the mean of its divisors is an integer number (3277413255690).

Almost surely, 2^{51630121452331} is an apocalyptic number.

51630121452331 is a deficient number, since it is larger than the sum of its proper divisors (808490638709).

51630121452331 is a wasteful number, since it uses less digits than its factorization.

51630121452331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078334.

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 51630121452331 its reverse (13325412103615), we get a palindrome (64955533555946).

The spelling of 51630121452331 in words is "fifty-one trillion, six hundred thirty billion, one hundred twenty-one million, four hundred fifty-two thousand, three hundred thirty-one".