51072742 has 16 divisors (see below), whose sum is σ = 91360512. Its totient is φ = 20936520.

The previous prime is 51072737. The next prime is 51072751. The reversal of 51072742 is 24727015.

It is a self number, because there is not a number n which added to its sum of digits gives 51072742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78984 + ... + 79627.

It is an arithmetic number, because the mean of its divisors is an integer number (5710032).

Almost surely, 2^51072742 is an apocalyptic number.

51072742 is a deficient number, since it is larger than the sum of its proper divisors (40287770).

51072742 is a wasteful number, since it uses less digits than its factorization.

51072742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158643.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 51072742 is about 7146.5195724912. The cubic root of 51072742 is about 371.0192059765.

Adding to 51072742 its reverse (24727015), we get a palindrome (75799757).

The spelling of 51072742 in words is "fifty-one million, seventy-two thousand, seven hundred forty-two".