51331169 has 2 divisors, whose sum is σ = 51331170. Its totient is φ = 51331168.

The previous prime is 51331157. The next prime is 51331199. The reversal of 51331169 is 96113315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40195600 + 11135569 = 6340^2 + 3337^2 .

It is a cyclic number.

It is not a de Polignac number, because 51331169 - 2¹⁶ = 51265633 is a prime.

It is a super-2 number, since 2×51331169² = 5269777821813122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51331199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25665584 + 25665585.

It is an arithmetic number, because the mean of its divisors is an integer number (25665585).

Almost surely, 2^51331169 is an apocalyptic number.

It is an amenable number.

51331169 is a deficient number, since it is larger than the sum of its proper divisors (1).

51331169 is an equidigital number, since it uses as much as digits as its factorization.

51331169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2430, while the sum is 29.

The square root of 51331169 is about 7164.5773776267. The cubic root of 51331169 is about 371.6439365759.

The spelling of 51331169 in words is "fifty-one million, three hundred thirty-one thousand, one hundred sixty-nine".