51158730 has 32 divisors (see below), whose sum is σ = 140321664. Its totient is φ = 11693376.

The previous prime is 51158719. The next prime is 51158747. The reversal of 51158730 is 3785115.

51158730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121597 + ... + 122016.

It is an arithmetic number, because the mean of its divisors is an integer number (4385052).

Almost surely, 2^51158730 is an apocalyptic number.

51158730 is an abundant number, since it is smaller than the sum of its proper divisors (89162934).

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

51158730 is a wasteful number, since it uses less digits than its factorization.

51158730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243630.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 51158730 is about 7152.5331177143. The cubic root of 51158730 is about 371.2273098853.

The spelling of 51158730 in words is "fifty-one million, one hundred fifty-eight thousand, seven hundred thirty".