51045242 has 8 divisors (see below), whose sum is σ = 76810356. Its totient is φ = 25441792.

The previous prime is 51045209. The next prime is 51045301. The reversal of 51045242 is 24254015.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 33396841 + 17648401 = 5779^2 + 4201^2 .

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

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, 39623 + ... + 40890.

Almost surely, 2^51045242 is an apocalyptic number.

51045242 is a deficient number, since it is larger than the sum of its proper divisors (25765114).

51045242 is a wasteful number, since it uses less digits than its factorization.

51045242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80832.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 51045242 is about 7144.5952999453. The cubic root of 51045242 is about 370.9526025427.

Adding to 51045242 its reverse (24254015), we get a palindrome (75299257).

The spelling of 51045242 in words is "fifty-one million, forty-five thousand, two hundred forty-two".