51475169 has 2 divisors, whose sum is σ = 51475170. Its totient is φ = 51475168.

The previous prime is 51475163. The next prime is 51475181. The reversal of 51475169 is 96157415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39225169 + 12250000 = 6263^2 + 3500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51475169 is a prime.

It is a super-2 number, since 2×51475169² = 5299386047157122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51475163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25737584 + 25737585.

It is an arithmetic number, because the mean of its divisors is an integer number (25737585).

Almost surely, 2^51475169 is an apocalyptic number.

It is an amenable number.

51475169 is a deficient number, since it is larger than the sum of its proper divisors (1).

51475169 is an equidigital number, since it uses as much as digits as its factorization.

51475169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 38.

The square root of 51475169 is about 7174.6197808664. The cubic root of 51475169 is about 371.9911379744.

The spelling of 51475169 in words is "fifty-one million, four hundred seventy-five thousand, one hundred sixty-nine".