51551600 has 30 divisors (see below), whose sum is σ = 123853680. Its totient is φ = 20620480.

The previous prime is 51551573. The next prime is 51551611. The reversal of 51551600 is 615515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64040 + ... + 64839.

It is an arithmetic number, because the mean of its divisors is an integer number (4128456).

Almost surely, 2^51551600 is an apocalyptic number.

51551600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51551600 is an abundant number, since it is smaller than the sum of its proper divisors (72302080).

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

51551600 is a wasteful number, since it uses less digits than its factorization.

51551600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128897 (or 128886 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 51551600 is about 7179.9442894775. The cubic root of 51551600 is about 372.1751593509.

The spelling of 51551600 in words is "fifty-one million, five hundred fifty-one thousand, six hundred".