51635242 has 8 divisors (see below), whose sum is σ = 77616000. Its totient is φ = 25763244.

The previous prime is 51635209. The next prime is 51635249. The reversal of 51635242 is 24253615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51635242.

It is not an unprimeable number, because it can be changed into a prime (51635249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25992 + ... + 27907.

It is an arithmetic number, because the mean of its divisors is an integer number (9702000).

Almost surely, 2^51635242 is an apocalyptic number.

51635242 is a deficient number, since it is larger than the sum of its proper divisors (25980758).

51635242 is a wasteful number, since it uses less digits than its factorization.

51635242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54380.

The product of its digits is 7200, while the sum is 28.

The square root of 51635242 is about 7185.7666257679. The cubic root of 51635242 is about 372.3763341872.

Adding to 51635242 its reverse (24253615), we get a palindrome (75888857).

The spelling of 51635242 in words is "fifty-one million, six hundred thirty-five thousand, two hundred forty-two".