51042642 has 16 divisors (see below), whose sum is σ = 116668992. Its totient is φ = 14583600.

The previous prime is 51042637. The next prime is 51042643. The reversal of 51042642 is 24624015.

It is not an unprimeable number, because it can be changed into a prime (51042643) 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, 607609 + ... + 607692.

It is an arithmetic number, because the mean of its divisors is an integer number (7291812).

Almost surely, 2^51042642 is an apocalyptic number.

51042642 is an abundant number, since it is smaller than the sum of its proper divisors (65626350).

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

51042642 is a wasteful number, since it uses less digits than its factorization.

51042642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215313.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 51042642 is about 7144.4133419057. The cubic root of 51042642 is about 370.9463042531.

Adding to 51042642 its reverse (24624015), we get a palindrome (75666657).

The spelling of 51042642 in words is "fifty-one million, forty-two thousand, six hundred forty-two".