51390300 has 72 divisors (see below), whose sum is σ = 160139056. Its totient is φ = 12648960.

The previous prime is 51390293. The next prime is 51390301. The reversal of 51390300 is 309315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51390301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2689 + ... + 10488.

Almost surely, 2^51390300 is an apocalyptic number.

51390300 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51390300 is an abundant number, since it is smaller than the sum of its proper divisors (108748756).

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

51390300 is a wasteful number, since it uses less digits than its factorization.

51390300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13207 (or 13200 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 21.

The square root of 51390300 is about 7168.7028115273. The cubic root of 51390300 is about 371.7865870365.

Adding to 51390300 its reverse (309315), we get a palindrome (51699615).

The spelling of 51390300 in words is "fifty-one million, three hundred ninety thousand, three hundred".