51985333 has 4 divisors (see below), whose sum is σ = 53390380. Its totient is φ = 50580288.

The previous prime is 51985331. The next prime is 51985343. The reversal of 51985333 is 33358915.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50154724 + 1830609 = 7082^2 + 1353^2 .

It is a cyclic number.

It is not a de Polignac number, because 51985333 - 2¹ = 51985331 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1405009 = 51985333 / (5 + 1 + 9 + 8 + 5 + 3 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51985292 and 51985301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51985331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702468 + ... + 702541.

It is an arithmetic number, because the mean of its divisors is an integer number (13347595).

Almost surely, 2^51985333 is an apocalyptic number.

It is an amenable number.

51985333 is a deficient number, since it is larger than the sum of its proper divisors (1405047).

51985333 is a wasteful number, since it uses less digits than its factorization.

51985333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405046.

The product of its digits is 48600, while the sum is 37.

The square root of 51985333 is about 7210.0855057343. The cubic root of 51985333 is about 373.2160195990.

The spelling of 51985333 in words is "fifty-one million, nine hundred eighty-five thousand, three hundred thirty-three".