51871604 has 24 divisors (see below), whose sum is σ = 94348800. Its totient is φ = 24923360.

The previous prime is 51871591. The next prime is 51871613. The reversal of 51871604 is 40617815.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26789 + ... + 28659.

It is an arithmetic number, because the mean of its divisors is an integer number (3931200).

Almost surely, 2^51871604 is an apocalyptic number.

It is an amenable number.

51871604 is a deficient number, since it is larger than the sum of its proper divisors (42477196).

51871604 is a wasteful number, since it uses less digits than its factorization.

51871604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143 (or 2141 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 51871604 is about 7202.1943878238. The cubic root of 51871604 is about 372.9436576797.

The spelling of 51871604 in words is "fifty-one million, eight hundred seventy-one thousand, six hundred four".