51004442 has 4 divisors (see below), whose sum is σ = 76506666. Its totient is φ = 25502220.

The previous prime is 51004423. The next prime is 51004469. The reversal of 51004442 is 24440015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 37834801 + 13169641 = 6151^2 + 3629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12751109 + ... + 12751112.

Almost surely, 2^51004442 is an apocalyptic number.

51004442 is a deficient number, since it is larger than the sum of its proper divisors (25502224).

51004442 is a wasteful number, since it uses less digits than its factorization.

51004442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25502223.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 51004442 is about 7141.7394239779. The cubic root of 51004442 is about 370.8537431794.

Adding to 51004442 its reverse (24440015), we get a palindrome (75444457).

The spelling of 51004442 in words is "fifty-one million, four thousand, four hundred forty-two".