51675820 has 48 divisors (see below), whose sum is σ = 130556160. Its totient is φ = 16784064.

The previous prime is 51675817. The next prime is 51675847. The reversal of 51675820 is 2857615.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7054 + ... + 12373.

It is an arithmetic number, because the mean of its divisors is an integer number (2719920).

Almost surely, 2^51675820 is an apocalyptic number.

It is an amenable number.

51675820 is an abundant number, since it is smaller than the sum of its proper divisors (78880340).

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

51675820 is a wasteful number, since it uses less digits than its factorization.

51675820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19462 (or 19460 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 51675820 is about 7188.5895695887. The cubic root of 51675820 is about 372.4738536968.

The spelling of 51675820 in words is "fifty-one million, six hundred seventy-five thousand, eight hundred twenty".