51030042 has 32 divisors (see below), whose sum is σ = 116854272. Its totient is φ = 14553264.

The previous prime is 51030041. The next prime is 51030047. The reversal of 51030042 is 24003015.

It is not an unprimeable number, because it can be changed into a prime (51030041) 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, 39133 + ... + 40415.

It is an arithmetic number, because the mean of its divisors is an integer number (3651696).

Almost surely, 2^51030042 is an apocalyptic number.

51030042 is an abundant number, since it is smaller than the sum of its proper divisors (65824230).

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

51030042 is a wasteful number, since it uses less digits than its factorization.

51030042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 51030042 is about 7143.5314795975. The cubic root of 51030042 is about 370.9157787429.

Adding to 51030042 its reverse (24003015), we get a palindrome (75033057).

The spelling of 51030042 in words is "fifty-one million, thirty thousand, forty-two".