51333223426551 has 24 divisors (see below), whose sum is σ = 80966568334080. Its totient is φ = 31081101181200.

The previous prime is 51333223426519. The next prime is 51333223426553. The reversal of 51333223426551 is 15562432233315.

51333223426551 is a `hidden beast` number, since 5 + 1 + 3 + 3 + 32 + 23 + 42 + 6 + 551 = 666.

It is not a de Polignac number, because 51333223426551 - 2⁵ = 51333223426519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51333223426497 and 51333223426506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51333223426553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 249424285 + ... + 249630006.

It is an arithmetic number, because the mean of its divisors is an integer number (3373607013920).

Almost surely, 2^{51333223426551} is an apocalyptic number.

51333223426551 is a deficient number, since it is larger than the sum of its proper divisors (29633344907529).

51333223426551 is a wasteful number, since it uses less digits than its factorization.

51333223426551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499055347 (or 499055344 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 45.

Adding to 51333223426551 its reverse (15562432233315), we get a palindrome (66895655659866).

The spelling of 51333223426551 in words is "fifty-one trillion, three hundred thirty-three billion, two hundred twenty-three million, four hundred twenty-six thousand, five hundred fifty-one".