51425242 has 12 divisors (see below), whose sum is σ = 84788298. Its totient is φ = 23375000.

The previous prime is 51425239. The next prime is 51425243. The reversal of 51425242 is 24252415.

It can be written as a sum of positive squares in only one way, i.e., 33860761 + 17564481 = 5819^2 + 4191^2 .

It is not an unprimeable number, because it can be changed into a prime (51425243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106009 + ... + 106492.

Almost surely, 2^51425242 is an apocalyptic number.

51425242 is a deficient number, since it is larger than the sum of its proper divisors (33363056).

51425242 is a wasteful number, since it uses less digits than its factorization.

51425242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212525 (or 212514 counting only the distinct ones).

The product of its digits is 3200, while the sum is 25.

The square root of 51425242 is about 7171.1395189328. The cubic root of 51425242 is about 371.8708313635.

Adding to 51425242 its reverse (24252415), we get a palindrome (75677657).

The spelling of 51425242 in words is "fifty-one million, four hundred twenty-five thousand, two hundred forty-two".