51558680 has 16 divisors (see below), whose sum is σ = 116007120. Its totient is φ = 20623456.

The previous prime is 51558653. The next prime is 51558697. The reversal of 51558680 is 8685515.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644444 + ... + 644523.

It is an arithmetic number, because the mean of its divisors is an integer number (7250445).

Almost surely, 2^51558680 is an apocalyptic number.

It is an amenable number.

51558680 is an abundant number, since it is smaller than the sum of its proper divisors (64448440).

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

51558680 is a wasteful number, since it uses less digits than its factorization.

51558680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288978 (or 1288974 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 38.

The square root of 51558680 is about 7180.4373125876. The cubic root of 51558680 is about 372.1921965170.

It can be divided in two parts, 515 and 58680, that added together give a palindrome (59195).

The spelling of 51558680 in words is "fifty-one million, five hundred fifty-eight thousand, six hundred eighty".