51266552412321 has 24 divisors (see below), whose sum is σ = 76613371623360. Its totient is φ = 32995637186400.

The previous prime is 51266552412239. The next prime is 51266552412337. The reversal of 51266552412321 is 12321425566215.

51266552412321 is a `hidden beast` number, since 5 + 1 + 2 + 66 + 552 + 4 + 1 + 2 + 32 + 1 = 666.

It is not a de Polignac number, because 51266552412321 - 2³⁴ = 51249372543137 is a prime.

It is a super-2 number, since 2×51266552412321² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51266552412391) 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, 8034565 + ... + 12926226.

It is an arithmetic number, because the mean of its divisors is an integer number (3192223817640).

Almost surely, 2^{51266552412321} is an apocalyptic number.

It is an amenable number.

51266552412321 is a deficient number, since it is larger than the sum of its proper divisors (25346819211039).

51266552412321 is a wasteful number, since it uses less digits than its factorization.

51266552412321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20970197 (or 20970194 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

Adding to 51266552412321 its reverse (12321425566215), we get a palindrome (63587977978536).

The spelling of 51266552412321 in words is "fifty-one trillion, two hundred sixty-six billion, five hundred fifty-two million, four hundred twelve thousand, three hundred twenty-one".