51155008 has 28 divisors (see below), whose sum is σ = 102455980. Its totient is φ = 25339392.

The previous prime is 51154997. The next prime is 51155021. The reversal of 51155008 is 80055115.

It can be written as a sum of positive squares in 2 ways, for example, as 13307904 + 37847104 = 3648^2 + 6152^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3310 + ... + 10642.

Almost surely, 2^51155008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51155008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51227990).

51155008 is an abundant number, since it is smaller than the sum of its proper divisors (51300972).

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

51155008 is a wasteful number, since it uses less digits than its factorization.

51155008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7454 (or 7444 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 51155008 is about 7152.2729254413. The cubic root of 51155008 is about 371.2183069152.

The spelling of 51155008 in words is "fifty-one million, one hundred fifty-five thousand, eight".