51284100 has 72 divisors (see below), whose sum is σ = 169586368. Its totient is φ = 11721600.

The previous prime is 51284047. The next prime is 51284131. The reversal of 51284100 is 148215.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10111 + ... + 14310.

Almost surely, 2^51284100 is an apocalyptic number.

51284100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51284100 is an abundant number, since it is smaller than the sum of its proper divisors (118302268).

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

51284100 is a wasteful number, since it uses less digits than its factorization.

51284100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24445 (or 24438 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 51284100 is about 7161.2917829118. The cubic root of 51284100 is about 371.5303067332.

The spelling of 51284100 in words is "fifty-one million, two hundred eighty-four thousand, one hundred".