51545004 has 48 divisors (see below), whose sum is σ = 138286848. Its totient is φ = 14637888.

The previous prime is 51544957. The next prime is 51545023. The reversal of 51545004 is 40054515.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12759 + ... + 16305.

It is an arithmetic number, because the mean of its divisors is an integer number (2880976).

Almost surely, 2^51545004 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 51545004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69143424).

51545004 is an abundant number, since it is smaller than the sum of its proper divisors (86741844).

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

51545004 is a wasteful number, since it uses less digits than its factorization.

51545004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3734 (or 3732 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 51545004 is about 7179.4849397432. The cubic root of 51545004 is about 372.1592854688.

Adding to 51545004 its reverse (40054515), we get a palindrome (91599519).

The spelling of 51545004 in words is "fifty-one million, five hundred forty-five thousand, four".