51223147646933 has 4 divisors (see below), whose sum is σ = 51798688631820. Its totient is φ = 50647606662048.

The previous prime is 51223147646897. The next prime is 51223147646959. The reversal of 51223147646933 is 33964674132215.

51223147646933 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 20614569266929 + 30608578380004 = 4540327^2 + 5532502^2 .

It is a cyclic number.

It is not a de Polignac number, because 51223147646933 - 2¹² = 51223147642837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223147646963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287770492310 + ... + 287770492487.

It is an arithmetic number, because the mean of its divisors is an integer number (12949672157955).

Almost surely, 2^{51223147646933} is an apocalyptic number.

It is an amenable number.

51223147646933 is a deficient number, since it is larger than the sum of its proper divisors (575540984887).

51223147646933 is an equidigital number, since it uses as much as digits as its factorization.

51223147646933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575540984886.

The product of its digits is 19595520, while the sum is 56.

The spelling of 51223147646933 in words is "fifty-one trillion, two hundred twenty-three billion, one hundred forty-seven million, six hundred forty-six thousand, nine hundred thirty-three".