51490544 has 80 divisors (see below), whose sum is σ = 119992320. Its totient is φ = 20939520.

The previous prime is 51490531. The next prime is 51490577. The reversal of 51490544 is 44509415.

51490544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51490544² = 5302552242831872, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51490544.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269489 + ... + 269679.

It is an arithmetic number, because the mean of its divisors is an integer number (1499904).

Almost surely, 2^51490544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51490544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59996160).

51490544 is an abundant number, since it is smaller than the sum of its proper divisors (68501776).

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

51490544 is a wasteful number, since it uses less digits than its factorization.

51490544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 51490544 is about 7175.6911862203. The cubic root of 51490544 is about 372.0281706805.

Adding to 51490544 its reverse (44509415), we get a palindrome (95999959).

The spelling of 51490544 in words is "fifty-one million, four hundred ninety thousand, five hundred forty-four".