51186730 has 32 divisors (see below), whose sum is σ = 109880064. Its totient is φ = 16786176.

The previous prime is 51186719. The next prime is 51186731. The reversal of 51186730 is 3768115.

It is a junction number, because it is equal to n+sod(n) for n = 51186692 and 51186701.

It is not an unprimeable number, because it can be changed into a prime (51186731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14287 + ... + 17506.

It is an arithmetic number, because the mean of its divisors is an integer number (3433752).

Almost surely, 2^51186730 is an apocalyptic number.

51186730 is an abundant number, since it is smaller than the sum of its proper divisors (58693334).

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

51186730 is a wasteful number, since it uses less digits than its factorization.

51186730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31830.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 51186730 is about 7154.4901984698. The cubic root of 51186730 is about 371.2950237693.

The spelling of 51186730 in words is "fifty-one million, one hundred eighty-six thousand, seven hundred thirty".