51242660 has 24 divisors (see below), whose sum is σ = 122982720. Its totient is φ = 17568864.

The previous prime is 51242651. The next prime is 51242663. The reversal of 51242660 is 6624215.

51242660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51242663) 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, 182870 + ... + 183149.

It is an arithmetic number, because the mean of its divisors is an integer number (5124280).

Almost surely, 2^51242660 is an apocalyptic number.

It is an amenable number.

51242660 is an abundant number, since it is smaller than the sum of its proper divisors (71740060).

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

51242660 is a wasteful number, since it uses less digits than its factorization.

51242660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366035 (or 366033 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 51242660 is about 7158.3978654445. The cubic root of 51242660 is about 371.4302083613.

Adding to 51242660 its reverse (6624215), we get a palindrome (57866875).

The spelling of 51242660 in words is "fifty-one million, two hundred forty-two thousand, six hundred sixty".