51669085 has 16 divisors (see below), whose sum is σ = 67024944. Its totient is φ = 38011392.

The previous prime is 51669067. The next prime is 51669089. The reversal of 51669085 is 58096615.

It can be written as a sum of positive squares in 8 ways, for example, as 5890329 + 45778756 = 2427^2 + 6766^2 .

It is a cyclic number.

It is not a de Polignac number, because 51669085 - 2⁵ = 51669053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51669089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17689 + ... + 20401.

It is an arithmetic number, because the mean of its divisors is an integer number (4189059).

Almost surely, 2^51669085 is an apocalyptic number.

It is an amenable number.

51669085 is a deficient number, since it is larger than the sum of its proper divisors (15355859).

51669085 is a wasteful number, since it uses less digits than its factorization.

51669085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 51669085 is about 7188.1211035986. The cubic root of 51669085 is about 372.4576712708.

The spelling of 51669085 in words is "fifty-one million, six hundred sixty-nine thousand, eighty-five".