51005404 has 24 divisors (see below), whose sum is σ = 90752256. Its totient is φ = 25080000.

The previous prime is 51005393. The next prime is 51005429. The reversal of 51005404 is 40450015.

51005404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76834 + ... + 77494.

It is an arithmetic number, because the mean of its divisors is an integer number (3781344).

Almost surely, 2^51005404 is an apocalyptic number.

It is an amenable number.

51005404 is a deficient number, since it is larger than the sum of its proper divisors (39746852).

51005404 is a wasteful number, since it uses less digits than its factorization.

51005404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 51005404 is about 7141.8067741994. The cubic root of 51005404 is about 370.8560747349.

Adding to 51005404 its reverse (40450015), we get a palindrome (91455419).

The spelling of 51005404 in words is "fifty-one million, five thousand, four hundred four".