51786330 has 16 divisors (see below), whose sum is σ = 124287264. Its totient is φ = 13809680.

The previous prime is 51786323. The next prime is 51786331. The reversal of 51786330 is 3368715.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51786291 and 51786300.

It is not an unprimeable number, because it can be changed into a prime (51786331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863076 + ... + 863135.

It is an arithmetic number, because the mean of its divisors is an integer number (7767954).

Almost surely, 2^51786330 is an apocalyptic number.

51786330 is an abundant number, since it is smaller than the sum of its proper divisors (72500934).

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

51786330 is a wasteful number, since it uses less digits than its factorization.

51786330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726221.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 51786330 is about 7196.2719515038. The cubic root of 51786330 is about 372.7391794549.

The spelling of 51786330 in words is "fifty-one million, seven hundred eighty-six thousand, three hundred thirty".