51955263 has 20 divisors (see below), whose sum is σ = 78495120. Its totient is φ = 34242912.

The previous prime is 51955231. The next prime is 51955283. The reversal of 51955263 is 36255915.

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

It is not a de Polignac number, because 51955263 - 2⁵ = 51955231 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51955283) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3606 + ... + 10812.

It is an arithmetic number, because the mean of its divisors is an integer number (3924756).

Almost surely, 2^51955263 is an apocalyptic number.

51955263 is a deficient number, since it is larger than the sum of its proper divisors (26539857).

51955263 is an equidigital number, since it uses as much as digits as its factorization.

51955263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7308 (or 7299 counting only the distinct ones).

The product of its digits is 40500, while the sum is 36.

The square root of 51955263 is about 7207.9999306326. Note that the first 4 decimals coincide. The cubic root of 51955263 is about 373.1440456428.

The spelling of 51955263 in words is "fifty-one million, nine hundred fifty-five thousand, two hundred sixty-three".