51481344 has 36 divisors (see below), whose sum is σ = 137017496. Its totient is φ = 17160192.

The previous prime is 51481343. The next prime is 51481361. The reversal of 51481344 is 44318415.

It is not an unprimeable number, because it can be changed into a prime (51481343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32749 + ... + 34284.

Almost surely, 2^51481344 is an apocalyptic number.

It is an amenable number.

51481344 is an abundant number, since it is smaller than the sum of its proper divisors (85536152).

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

51481344 is an equidigital number, since it uses as much as digits as its factorization.

51481344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67052 (or 67038 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 51481344 is about 7175.0501043547. The cubic root of 51481344 is about 372.0060121586.

Adding to 51481344 its reverse (44318415), we get a palindrome (95799759).

The spelling of 51481344 in words is "fifty-one million, four hundred eighty-one thousand, three hundred forty-four".