51011804 has 6 divisors (see below), whose sum is σ = 89270664. Its totient is φ = 25505900.

The previous prime is 51011791. The next prime is 51011809. The reversal of 51011804 is 40811015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011809) 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 as a sum of consecutive naturals, namely, 6376472 + ... + 6376479.

It is an arithmetic number, because the mean of its divisors is an integer number (14878444).

Almost surely, 2^51011804 is an apocalyptic number.

It is an amenable number.

51011804 is a deficient number, since it is larger than the sum of its proper divisors (38258860).

51011804 is a wasteful number, since it uses less digits than its factorization.

51011804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12752955 (or 12752953 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 51011804 is about 7142.2548260336. The cubic root of 51011804 is about 370.8715853764.

Adding to 51011804 its reverse (40811015), we get a palindrome (91822819).

It can be divided in two parts, 51011 and 804, that added together give a palindrome (51815).

The spelling of 51011804 in words is "fifty-one million, eleven thousand, eight hundred four".