51228685 has 8 divisors (see below), whose sum is σ = 61549056. Its totient is φ = 40933200.

The previous prime is 51228673. The next prime is 51228689. The reversal of 51228685 is 58682215.

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

It is not a de Polignac number, because 51228685 - 2⁹ = 51228173 is a prime.

It is a super-3 number, since 3×51228685³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51228689) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1341 + ... + 10210.

It is an arithmetic number, because the mean of its divisors is an integer number (7693632).

Almost surely, 2^51228685 is an apocalyptic number.

It is an amenable number.

51228685 is a deficient number, since it is larger than the sum of its proper divisors (10320371).

51228685 is a wasteful number, since it uses less digits than its factorization.

51228685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12443.

The product of its digits is 38400, while the sum is 37.

The square root of 51228685 is about 7157.4216726416. The cubic root of 51228685 is about 371.3964395633.

The spelling of 51228685 in words is "fifty-one million, two hundred twenty-eight thousand, six hundred eighty-five".