51936869 has 2 divisors, whose sum is σ = 51936870. Its totient is φ = 51936868.

The previous prime is 51936847. The next prime is 51936881. The reversal of 51936869 is 96863915.

51936869 is nontrivially palindromic in base 13.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47472100 + 4464769 = 6890^2 + 2113^2 .

It is a cyclic number.

It is not a de Polignac number, because 51936869 - 2²⁴ = 35159653 is a prime.

It is a super-2 number, since 2×51936869² = 5394876723046322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51936809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25968434 + 25968435.

It is an arithmetic number, because the mean of its divisors is an integer number (25968435).

Almost surely, 2^51936869 is an apocalyptic number.

It is an amenable number.

51936869 is a deficient number, since it is larger than the sum of its proper divisors (1).

51936869 is an equidigital number, since it uses as much as digits as its factorization.

51936869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 51936869 is about 7206.7238742719. The cubic root of 51936869 is about 373.1000050502.

The spelling of 51936869 in words is "fifty-one million, nine hundred thirty-six thousand, eight hundred sixty-nine".