51205600 has 36 divisors (see below), whose sum is σ = 125007624. Its totient is φ = 20481920.

The previous prime is 51205591. The next prime is 51205601. The reversal of 51205600 is 650215.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51205601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31204 + ... + 32803.

It is an arithmetic number, because the mean of its divisors is an integer number (3472434).

Almost surely, 2^51205600 is an apocalyptic number.

51205600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51205600 is an abundant number, since it is smaller than the sum of its proper divisors (73802024).

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

51205600 is a wasteful number, since it uses less digits than its factorization.

51205600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64027 (or 64014 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 51205600 is about 7155.8088291960. The cubic root of 51205600 is about 371.3406441629.

Adding to 51205600 its reverse (650215), we get a palindrome (51855815).

The spelling of 51205600 in words is "fifty-one million, two hundred five thousand, six hundred".