51518242 has 8 divisors (see below), whose sum is σ = 77453136. Its totient is φ = 25700532.

The previous prime is 51518219. The next prime is 51518261. The reversal of 51518242 is 24281515.

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 51518242.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28188 + ... + 29959.

It is an arithmetic number, because the mean of its divisors is an integer number (9681642).

Almost surely, 2^51518242 is an apocalyptic number.

51518242 is a deficient number, since it is larger than the sum of its proper divisors (25934894).

51518242 is a wasteful number, since it uses less digits than its factorization.

51518242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58592.

The product of its digits is 3200, while the sum is 28.

The square root of 51518242 is about 7177.6209150386. The cubic root of 51518242 is about 372.0948663515.

Adding to 51518242 its reverse (24281515), we get a palindrome (75799757).

The spelling of 51518242 in words is "fifty-one million, five hundred eighteen thousand, two hundred forty-two".