51481242 has 24 divisors (see below), whose sum is σ = 112259316. Its totient is φ = 17050176.

The previous prime is 51481237. The next prime is 51481247. The reversal of 51481242 is 24218415.

It is an interprime number because it is at equal distance from previous prime (51481237) and next prime (51481247).

It can be written as a sum of positive squares in 2 ways, for example, as 48316401 + 3164841 = 6951^2 + 1779^2 .

It is not an unprimeable number, because it can be changed into a prime (51481247) 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 11 ways as a sum of consecutive naturals, for example, 6283 + ... + 11934.

Almost surely, 2^51481242 is an apocalyptic number.

51481242 is an abundant number, since it is smaller than the sum of its proper divisors (60778074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51481242 is a wasteful number, since it uses less digits than its factorization.

51481242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18382 (or 18379 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 51481242 is about 7175.0429963869. The cubic root of 51481242 is about 372.0057664732.

Adding to 51481242 its reverse (24218415), we get a palindrome (75699657).

The spelling of 51481242 in words is "fifty-one million, four hundred eighty-one thousand, two hundred forty-two".