51135242 has 16 divisors (see below), whose sum is σ = 77500800. Its totient is φ = 25303440.

The previous prime is 51135223. The next prime is 51135247. The reversal of 51135242 is 24253115.

It is a super-2 number, since 2×51135242² = 5229625948797128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51135247) 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, 142259 + ... + 142617.

It is an arithmetic number, because the mean of its divisors is an integer number (4843800).

Almost surely, 2^51135242 is an apocalyptic number.

51135242 is a deficient number, since it is larger than the sum of its proper divisors (26365558).

51135242 is a wasteful number, since it uses less digits than its factorization.

51135242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901.

The product of its digits is 1200, while the sum is 23.

The square root of 51135242 is about 7150.8909934357. The cubic root of 51135242 is about 371.1704885516.

Adding to 51135242 its reverse (24253115), we get a palindrome (75388357).

It can be divided in two parts, 511 and 35242, that added together give a palindrome (35753).

The spelling of 51135242 in words is "fifty-one million, one hundred thirty-five thousand, two hundred forty-two".