51687230 has 32 divisors (see below), whose sum is σ = 109762560. Its totient is φ = 17148960.

The previous prime is 51687227. The next prime is 51687241. The reversal of 51687230 is 3278615.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9740 + ... + 14079.

It is an arithmetic number, because the mean of its divisors is an integer number (3430080).

Almost surely, 2^51687230 is an apocalyptic number.

51687230 is an abundant number, since it is smaller than the sum of its proper divisors (58075330).

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

51687230 is a wasteful number, since it uses less digits than its factorization.

51687230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23864.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 51687230 is about 7189.3831446098. The cubic root of 51687230 is about 372.5012657045.

The spelling of 51687230 in words is "fifty-one million, six hundred eighty-seven thousand, two hundred thirty".