51509460 has 48 divisors (see below), whose sum is σ = 144648000. Its totient is φ = 13695744.

The previous prime is 51509459. The next prime is 51509461. The reversal of 51509460 is 6490515.

51509460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51509459) and next prime (51509461).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51509461) 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 15 ways as a sum of consecutive naturals, for example, 23491 + ... + 25589.

It is an arithmetic number, because the mean of its divisors is an integer number (3013500).

Almost surely, 2^51509460 is an apocalyptic number.

It is an amenable number.

51509460 is an abundant number, since it is smaller than the sum of its proper divisors (93138540).

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

51509460 is a wasteful number, since it uses less digits than its factorization.

51509460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520 (or 2518 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 51509460 is about 7177.0091263701. The cubic root of 51509460 is about 372.0737222371.

Adding to 51509460 its reverse (6490515), we get a palindrome (57999975).

The spelling of 51509460 in words is "fifty-one million, five hundred nine thousand, four hundred sixty".