51772665 has 24 divisors (see below), whose sum is σ = 96361920. Its totient is φ = 23667168.

The previous prime is 51772649. The next prime is 51772687. The reversal of 51772665 is 56627715.

It is not a de Polignac number, because 51772665 - 2⁴ = 51772649 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34485 + ... + 35954.

It is an arithmetic number, because the mean of its divisors is an integer number (4015080).

Almost surely, 2^51772665 is an apocalyptic number.

It is an amenable number.

51772665 is a deficient number, since it is larger than the sum of its proper divisors (44589255).

51772665 is a wasteful number, since it uses less digits than its factorization.

51772665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70461 (or 70454 counting only the distinct ones).

The product of its digits is 88200, while the sum is 39.

The square root of 51772665 is about 7195.3224389182. The cubic root of 51772665 is about 372.7063913364.

The spelling of 51772665 in words is "fifty-one million, seven hundred seventy-two thousand, six hundred sixty-five".