51019930 has 32 divisors (see below), whose sum is σ = 101211264. Its totient is φ = 18398016.

The previous prime is 51019889. The next prime is 51019931. The reversal of 51019930 is 3991015.

It is not an unprimeable number, because it can be changed into a prime (51019931) 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, 1027 + ... + 10153.

It is an arithmetic number, because the mean of its divisors is an integer number (3162852).

Almost surely, 2^51019930 is an apocalyptic number.

51019930 is a deficient number, since it is larger than the sum of its proper divisors (50191334).

51019930 is a wasteful number, since it uses less digits than its factorization.

51019930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9190.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 51019930 is about 7142.8236713501. The cubic root of 51019930 is about 370.8912771749.

The spelling of 51019930 in words is "fifty-one million, nineteen thousand, nine hundred thirty".