51655263 has 36 divisors (see below), whose sum is σ = 79432920. Its totient is φ = 29833760.

The previous prime is 51655259. The next prime is 51655291. The reversal of 51655263 is 36255615.

51655263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51655263 - 2² = 51655259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51655223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 191893 + ... + 192161.

It is an arithmetic number, because the mean of its divisors is an integer number (2206470).

Almost surely, 2^51655263 is an apocalyptic number.

51655263 is a deficient number, since it is larger than the sum of its proper divisors (27777657).

51655263 is a wasteful number, since it uses less digits than its factorization.

51655263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 306 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 51655263 is about 7187.1595919389. The cubic root of 51655263 is about 372.4244562510.

It can be divided in two parts, 516552 and 63, that added together give a palindrome (516615).

The spelling of 51655263 in words is "fifty-one million, six hundred fifty-five thousand, two hundred sixty-three".