51449242 has 32 divisors (see below), whose sum is σ = 90078912. Its totient is φ = 21821184.

The previous prime is 51449213. The next prime is 51449249. The reversal of 51449242 is 24294415.

It is not an unprimeable number, because it can be changed into a prime (51449249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17653 + ... + 20359.

It is an arithmetic number, because the mean of its divisors is an integer number (2814966).

Almost surely, 2^51449242 is an apocalyptic number.

51449242 is a deficient number, since it is larger than the sum of its proper divisors (38629670).

51449242 is a wasteful number, since it uses less digits than its factorization.

51449242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782.

The product of its digits is 11520, while the sum is 31.

The square root of 51449242 is about 7172.8126979589. The cubic root of 51449242 is about 371.9286726852.

The spelling of 51449242 in words is "fifty-one million, four hundred forty-nine thousand, two hundred forty-two".