51825870 has 48 divisors (see below), whose sum is σ = 135542160. Its totient is φ = 13738752.

The previous prime is 51825853. The next prime is 51825883. The reversal of 51825870 is 7852815.

It is a Curzon number.

It is a congruent number.

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, 14502 + ... + 17718.

It is an arithmetic number, because the mean of its divisors is an integer number (2823795).

Almost surely, 2^51825870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51825870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67771080).

51825870 is an abundant number, since it is smaller than the sum of its proper divisors (83716290).

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

51825870 is a wasteful number, since it uses less digits than its factorization.

51825870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409 (or 3406 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 51825870 is about 7199.0186831262. The cubic root of 51825870 is about 372.8340201705.

The spelling of 51825870 in words is "fifty-one million, eight hundred twenty-five thousand, eight hundred seventy".