51244042 has 4 divisors (see below), whose sum is σ = 76866066. Its totient is φ = 25622020.

The previous prime is 51244021. The next prime is 51244043. The reversal of 51244042 is 24044215.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50395801 + 848241 = 7099^2 + 921^2 .

It is a super-3 number, since 3×51244042³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51244043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12811009 + ... + 12811012.

Almost surely, 2^51244042 is an apocalyptic number.

51244042 is a deficient number, since it is larger than the sum of its proper divisors (25622024).

51244042 is a wasteful number, since it uses less digits than its factorization.

51244042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25622023.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 51244042 is about 7158.4943947732. The cubic root of 51244042 is about 371.4335474538.

Adding to 51244042 its reverse (24044215), we get a palindrome (75288257).

The spelling of 51244042 in words is "fifty-one million, two hundred forty-four thousand, forty-two".