51323900 has 18 divisors (see below), whose sum is σ = 111373080. Its totient is φ = 20529520.

The previous prime is 51323893. The next prime is 51323903. The reversal of 51323900 is 932315.

It is a happy number.

It is a super-2 number, since 2×51323900² = 5268285422420000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51323903) 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, 256520 + ... + 256719.

Almost surely, 2^51323900 is an apocalyptic number.

51323900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51323900 is an abundant number, since it is smaller than the sum of its proper divisors (60049180).

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

51323900 is a wasteful number, since it uses less digits than its factorization.

51323900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513253 (or 513246 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 51323900 is about 7164.0700722425. The cubic root of 51323900 is about 371.6263929317.

The spelling of 51323900 in words is "fifty-one million, three hundred twenty-three thousand, nine hundred".