51323202169 has 8 divisors (see below), whose sum is σ = 51857282120. Its totient is φ = 50789223936.

The previous prime is 51323202157. The next prime is 51323202199. The reversal of 51323202169 is 96120232315.

It can be written as a sum of positive squares in 4 ways, for example, as 32082183225 + 19241018944 = 179115^2 + 138712^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51323202169 - 2¹⁹ = 51322677881 is a prime.

It is a super-2 number, since 2×51323202169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51323202149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1403287 + ... + 1439395.

It is an arithmetic number, because the mean of its divisors is an integer number (6482160265).

Almost surely, 2^51323202169 is an apocalyptic number.

It is an amenable number.

51323202169 is a deficient number, since it is larger than the sum of its proper divisors (534079951).

51323202169 is a wasteful number, since it uses less digits than its factorization.

51323202169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50859.

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 51323202169 in words is "fifty-one billion, three hundred twenty-three million, two hundred two thousand, one hundred sixty-nine".