51858422 has 48 divisors (see below), whose sum is σ = 102041856. Its totient is φ = 19326120.

The previous prime is 51858421. The next prime is 51858439. The reversal of 51858422 is 22485815.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51858421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2254703 + ... + 2254725.

It is an arithmetic number, because the mean of its divisors is an integer number (2125872).

Almost surely, 2^51858422 is an apocalyptic number.

51858422 is a deficient number, since it is larger than the sum of its proper divisors (50183434).

51858422 is an frugal number, since it uses more digits than its factorization.

51858422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 43 counting only the distinct ones).

The product of its digits is 25600, while the sum is 35.

The square root of 51858422 is about 7201.2791919214. The cubic root of 51858422 is about 372.9120632593.

The spelling of 51858422 in words is "fifty-one million, eight hundred fifty-eight thousand, four hundred twenty-two".