51604312 has 8 divisors (see below), whose sum is σ = 96758100. Its totient is φ = 25802152.

The previous prime is 51604309. The next prime is 51604321. The reversal of 51604312 is 21340615.

51604312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 3225262 + ... + 3225277.

Almost surely, 2^51604312 is an apocalyptic number.

It is an amenable number.

51604312 is a deficient number, since it is larger than the sum of its proper divisors (45153788).

51604312 is a wasteful number, since it uses less digits than its factorization.

51604312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6450545 (or 6450541 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 51604312 is about 7183.6141321761. The cubic root of 51604312 is about 372.3019670170.

Adding to 51604312 its reverse (21340615), we get a palindrome (72944927).

The spelling of 51604312 in words is "fifty-one million, six hundred four thousand, three hundred twelve".