51159769 has 2 divisors, whose sum is σ = 51159770. Its totient is φ = 51159768.

The previous prime is 51159767. The next prime is 51159821. The reversal of 51159769 is 96795115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36144144 + 15015625 = 6012^2 + 3875^2 .

It is a cyclic number.

It is not a de Polignac number, because 51159769 - 2¹ = 51159767 is a prime.

It is a super-2 number, since 2×51159769² = 5234643928266722, which contains 22 as substring.

Together with 51159767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51159767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25579884 + 25579885.

It is an arithmetic number, because the mean of its divisors is an integer number (25579885).

Almost surely, 2^51159769 is an apocalyptic number.

It is an amenable number.

51159769 is a deficient number, since it is larger than the sum of its proper divisors (1).

51159769 is an equidigital number, since it uses as much as digits as its factorization.

51159769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85050, while the sum is 43.

The square root of 51159769 is about 7152.6057489561. The cubic root of 51159769 is about 371.2298229954.

It can be divided in two parts, 5115 and 9769, that added together give a square (14884 = 122²).

The spelling of 51159769 in words is "fifty-one million, one hundred fifty-nine thousand, seven hundred sixty-nine".