51490460 has 24 divisors (see below), whose sum is σ = 123577440. Its totient is φ = 17653824.

The previous prime is 51490459. The next prime is 51490463. The reversal of 51490460 is 6409415.

51490460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51490463) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 183755 + ... + 184034.

It is an arithmetic number, because the mean of its divisors is an integer number (5149060).

Almost surely, 2^51490460 is an apocalyptic number.

It is an amenable number.

51490460 is an abundant number, since it is smaller than the sum of its proper divisors (72086980).

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

51490460 is a wasteful number, since it uses less digits than its factorization.

51490460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367805 (or 367803 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 51490460 is about 7175.6853331232. The cubic root of 51490460 is about 372.0279683755.

Adding to 51490460 its reverse (6409415), we get a palindrome (57899875).

The spelling of 51490460 in words is "fifty-one million, four hundred ninety thousand, four hundred sixty".