51123804 has 12 divisors (see below), whose sum is σ = 119288904. Its totient is φ = 17041264.

The previous prime is 51123803. The next prime is 51123817. The reversal of 51123804 is 40832115.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×51123804² = 5227286670860832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51123803) 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 in 3 ways as a sum of consecutive naturals, for example, 2130147 + ... + 2130170.

It is an arithmetic number, because the mean of its divisors is an integer number (9940742).

Almost surely, 2^51123804 is an apocalyptic number.

It is an amenable number.

51123804 is an abundant number, since it is smaller than the sum of its proper divisors (68165100).

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

51123804 is a wasteful number, since it uses less digits than its factorization.

51123804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260324 (or 4260322 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51123804 is about 7150.0911882297. The cubic root of 51123804 is about 371.1428118492.

Adding to 51123804 its reverse (40832115), we get a palindrome (91955919).

The spelling of 51123804 in words is "fifty-one million, one hundred twenty-three thousand, eight hundred four".