51553866043 has 2 divisors, whose sum is σ = 51553866044. Its totient is φ = 51553866042.

The previous prime is 51553865999. The next prime is 51553866071. The reversal of 51553866043 is 34066835515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51553866043 - 2²⁵ = 51520311611 is a prime.

It is a super-2 number, since 2×51553866043² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51553865984 and 51553866002.

It is not a weakly prime, because it can be changed into another prime (51553866073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25776933021 + 25776933022.

It is an arithmetic number, because the mean of its divisors is an integer number (25776933022).

Almost surely, 2^51553866043 is an apocalyptic number.

51553866043 is a deficient number, since it is larger than the sum of its proper divisors (1).

51553866043 is an equidigital number, since it uses as much as digits as its factorization.

51553866043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296000, while the sum is 46.

It can be divided in two parts, 515538 and 66043, that added together give a triangular number (581581 = T₁₀₇₈).

The spelling of 51553866043 in words is "fifty-one billion, five hundred fifty-three million, eight hundred sixty-six thousand, forty-three".