51432100 has 72 divisors (see below), whose sum is σ = 117992448. Its totient is φ = 19430400.

The previous prime is 51432067. The next prime is 51432103. The reversal of 51432100 is 123415.

51432100 = 1023² + 1024² + ... + 1069².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51432103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145524 + ... + 145876.

It is an arithmetic number, because the mean of its divisors is an integer number (1638784).

Almost surely, 2^51432100 is an apocalyptic number.

51432100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51432100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58996224).

51432100 is an abundant number, since it is smaller than the sum of its proper divisors (66560348).

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

51432100 is a wasteful number, since it uses less digits than its factorization.

51432100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 51432100 is about 7171.6176696754. The cubic root of 51432100 is about 371.8873613573.

Adding to 51432100 its reverse (123415), we get a palindrome (51555515).

The spelling of 51432100 in words is "fifty-one million, four hundred thirty-two thousand, one hundred".