51571669 has 2 divisors, whose sum is σ = 51571670. Its totient is φ = 51571668.

The previous prime is 51571633. The next prime is 51571679. The reversal of 51571669 is 96617515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34456900 + 17114769 = 5870^2 + 4137^2 .

It is a cyclic number.

It is not a de Polignac number, because 51571669 - 2¹¹ = 51569621 is a prime.

It is a super-2 number, since 2×51571669² = 5319274086891122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51571679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25785834 + 25785835.

It is an arithmetic number, because the mean of its divisors is an integer number (25785835).

Almost surely, 2^51571669 is an apocalyptic number.

It is an amenable number.

51571669 is a deficient number, since it is larger than the sum of its proper divisors (1).

51571669 is an equidigital number, since it uses as much as digits as its factorization.

51571669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 40.

The square root of 51571669 is about 7181.3417270034. The cubic root of 51571669 is about 372.2234489238.

The spelling of 51571669 in words is "fifty-one million, five hundred seventy-one thousand, six hundred sixty-nine".