51778230 has 96 divisors (see below), whose sum is σ = 150107904. Its totient is φ = 11195712.

The previous prime is 51778229. The next prime is 51778247. The reversal of 51778230 is 3287715.

It is a junction number, because it is equal to n+sod(n) for n = 51778191 and 51778200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75469 + ... + 76151.

It is an arithmetic number, because the mean of its divisors is an integer number (1563624).

Almost surely, 2^51778230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51778230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75053952).

51778230 is an abundant number, since it is smaller than the sum of its proper divisors (98329674).

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

51778230 is a wasteful number, since it uses less digits than its factorization.

51778230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 51778230 is about 7195.7091380906. The cubic root of 51778230 is about 372.7197448230.

The spelling of 51778230 in words is "fifty-one million, seven hundred seventy-eight thousand, two hundred thirty".