51555823 has 12 divisors (see below), whose sum is σ = 58259448. Its totient is φ = 45244640.

The previous prime is 51555773. The next prime is 51555827. The reversal of 51555823 is 32855515.

It is not a de Polignac number, because 51555823 - 2¹³ = 51547631 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 (51555827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6465 + ... + 12037.

It is an arithmetic number, because the mean of its divisors is an integer number (4854954).

Almost surely, 2^51555823 is an apocalyptic number.

51555823 is a deficient number, since it is larger than the sum of its proper divisors (6703625).

51555823 is a wasteful number, since it uses less digits than its factorization.

51555823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5642 (or 5613 counting only the distinct ones).

The product of its digits is 30000, while the sum is 34.

The square root of 51555823 is about 7180.2383665168. The cubic root of 51555823 is about 372.1853216788.

The spelling of 51555823 in words is "fifty-one million, five hundred fifty-five thousand, eight hundred twenty-three".