51830785 has 8 divisors (see below), whose sum is σ = 63216936. Its totient is φ = 40784640.

The previous prime is 51830783. The next prime is 51830789. The reversal of 51830785 is 58703815.

It can be written as a sum of positive squares in 4 ways, for example, as 5184 + 51825601 = 72^2 + 7199^2 .

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

It is not a de Polignac number, because 51830785 - 2¹ = 51830783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51830783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84664 + ... + 85273.

It is an arithmetic number, because the mean of its divisors is an integer number (7902117).

It is a Proth number, since it is equal to 6327 ⋅ 2¹³ + 1 and 6327 < 2¹³.

Almost surely, 2^51830785 is an apocalyptic number.

It is an amenable number.

51830785 is a deficient number, since it is larger than the sum of its proper divisors (11386151).

51830785 is a wasteful number, since it uses less digits than its factorization.

51830785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170003.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 51830785 is about 7199.3600410036. The cubic root of 51830785 is about 372.8458059272.

The spelling of 51830785 in words is "fifty-one million, eight hundred thirty thousand, seven hundred eighty-five".