51540604 has 24 divisors (see below), whose sum is σ = 91905408. Its totient is φ = 25285680.

The previous prime is 51540557. The next prime is 51540607. The reversal of 51540604 is 40604515.

51540604 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 not an unprimeable number, because it can be changed into a prime (51540607) by changing a digit.

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, 98287 + ... + 98809.

It is an arithmetic number, because the mean of its divisors is an integer number (3829392).

Almost surely, 2^51540604 is an apocalyptic number.

It is an amenable number.

51540604 is a deficient number, since it is larger than the sum of its proper divisors (40364804).

51540604 is a wasteful number, since it uses less digits than its factorization.

51540604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51540604 is about 7179.1785045366. The cubic root of 51540604 is about 372.1486957102.

The spelling of 51540604 in words is "fifty-one million, five hundred forty thousand, six hundred four".