51845508 has 144 divisors (see below), whose sum is σ = 160095936. Its totient is φ = 14463360.

The previous prime is 51845503. The next prime is 51845527. The reversal of 51845508 is 80554815.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51845503) 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 47 ways as a sum of consecutive naturals, for example, 138810 + ... + 139182.

Almost surely, 2^51845508 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 51845508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80047968).

51845508 is an abundant number, since it is smaller than the sum of its proper divisors (108250428).

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

51845508 is a wasteful number, since it uses less digits than its factorization.

51845508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 402 counting only the distinct ones).

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

The square root of 51845508 is about 7200.3824898404. The cubic root of 51845508 is about 372.8811059849.

The spelling of 51845508 in words is "fifty-one million, eight hundred forty-five thousand, five hundred eight".