51858450 has 144 divisors (see below), whose sum is σ = 161793216. Its totient is φ = 11664000.

The previous prime is 51858439. The next prime is 51858451. The reversal of 51858450 is 5485815.

It is not an unprimeable number, because it can be changed into a prime (51858451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 318069 + ... + 318231.

It is an arithmetic number, because the mean of its divisors is an integer number (1123564).

Almost surely, 2^51858450 is an apocalyptic number.

51858450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51858450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80896608).

51858450 is an abundant number, since it is smaller than the sum of its proper divisors (109934766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51858450 is a wasteful number, since it uses less digits than its factorization.

51858450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 51858450 is about 7201.2811360202. The cubic root of 51858450 is about 372.9121303749.

The spelling of 51858450 in words is "fifty-one million, eight hundred fifty-eight thousand, four hundred fifty".