51955265 has 4 divisors (see below), whose sum is σ = 62346324. Its totient is φ = 41564208.

The previous prime is 51955231. The next prime is 51955283. The reversal of 51955265 is 56255915.

It is a Cunningham number, because it is equal to 7208²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18696976 + 33258289 = 4324^2 + 5767^2 .

It is a cyclic number.

It is not a de Polignac number, because 51955265 - 2¹⁰ = 51954241 is a prime.

It is a super-2 number, since 2×51955265² = 5398699122440450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5195522 + ... + 5195531.

It is an arithmetic number, because the mean of its divisors is an integer number (15586581).

Almost surely, 2^51955265 is an apocalyptic number.

It is an amenable number.

51955265 is a deficient number, since it is larger than the sum of its proper divisors (10391059).

51955265 is a wasteful number, since it uses less digits than its factorization.

51955265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10391058.

The product of its digits is 67500, while the sum is 38.

The square root of 51955265 is about 7208.0000693674. Note that the first 4 decimals coincide. The cubic root of 51955265 is about 373.1440504308.

The spelling of 51955265 in words is "fifty-one million, nine hundred fifty-five thousand, two hundred sixty-five".