51432004 has 48 divisors (see below), whose sum is σ = 104167728. Its totient is φ = 22007808.

The previous prime is 51432001. The next prime is 51432013. The reversal of 51432004 is 40023415.

It can be written as a sum of positive squares in 8 ways, for example, as 23104 + 51408900 = 152^2 + 7170^2 .

It is not an unprimeable number, because it can be changed into a prime (51432001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64134 + ... + 64930.

It is an arithmetic number, because the mean of its divisors is an integer number (2170161).

Almost surely, 2^51432004 is an apocalyptic number.

It is an amenable number.

51432004 is an abundant number, since it is smaller than the sum of its proper divisors (52735724).

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

51432004 is a wasteful number, since it uses less digits than its factorization.

51432004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 51432004 is about 7171.6109766216. The cubic root of 51432004 is about 371.8871299765.

Adding to 51432004 its reverse (40023415), we get a palindrome (91455419).

The spelling of 51432004 in words is "fifty-one million, four hundred thirty-two thousand, four".