51232100 has 18 divisors (see below), whose sum is σ = 111173874. Its totient is φ = 20492800.

The previous prime is 51232091. The next prime is 51232133. The reversal of 51232100 is 123215.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 195364 + 51036736 = 442^2 + 7144^2 .

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, 256061 + ... + 256260.

Almost surely, 2^51232100 is an apocalyptic number.

51232100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51232100 is an abundant number, since it is smaller than the sum of its proper divisors (59941774).

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

51232100 is a wasteful number, since it uses less digits than its factorization.

51232100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512335 (or 512328 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 51232100 is about 7157.6602322267. The cubic root of 51232100 is about 371.4046920405.

Adding to 51232100 its reverse (123215), we get a palindrome (51355315).

The spelling of 51232100 in words is "fifty-one million, two hundred thirty-two thousand, one hundred".