51684100 has 72 divisors (see below), whose sum is σ = 122492160. Its totient is φ = 18814080.

The previous prime is 51684043. The next prime is 51684107. The reversal of 51684100 is 148615.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (51684107) 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, 107661 + ... + 108139.

It is an arithmetic number, because the mean of its divisors is an integer number (1701280).

Almost surely, 2^51684100 is an apocalyptic number.

51684100 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 51684100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61246080).

51684100 is an abundant number, since it is smaller than the sum of its proper divisors (70808060).

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

51684100 is a wasteful number, since it uses less digits than its factorization.

51684100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 51684100 is about 7189.1654592171. The cubic root of 51684100 is about 372.4937464229.

The spelling of 51684100 in words is "fifty-one million, six hundred eighty-four thousand, one hundred".