51809630 has 8 divisors (see below), whose sum is σ = 93257352. Its totient is φ = 20723848.

The previous prime is 51809629. The next prime is 51809671. The reversal of 51809630 is 3690815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2590472 + ... + 2590491.

It is an arithmetic number, because the mean of its divisors is an integer number (11657169).

Almost surely, 2^51809630 is an apocalyptic number.

51809630 is a deficient number, since it is larger than the sum of its proper divisors (41447722).

51809630 is a wasteful number, since it uses less digits than its factorization.

51809630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180970.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 51809630 is about 7197.8906632429. The cubic root of 51809630 is about 372.7950727167.

The spelling of 51809630 in words is "fifty-one million, eight hundred nine thousand, six hundred thirty".