51853321 has 4 divisors (see below), whose sum is σ = 55842052. Its totient is φ = 47864592.

The previous prime is 51853303. The next prime is 51853369. The reversal of 51853321 is 12335815.

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 30647296 + 21206025 = 5536^2 + 4605^2 .

It is a cyclic number.

It is not a de Polignac number, because 51853321 - 2⁵ = 51853289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51853321.

It is not an unprimeable number, because it can be changed into a prime (51853301) 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 3 ways as a sum of consecutive naturals, for example, 1994346 + ... + 1994371.

It is an arithmetic number, because the mean of its divisors is an integer number (13960513).

Almost surely, 2^51853321 is an apocalyptic number.

It is an amenable number.

51853321 is a deficient number, since it is larger than the sum of its proper divisors (3988731).

51853321 is a wasteful number, since it uses less digits than its factorization.

51853321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988730.

The product of its digits is 3600, while the sum is 28.

The square root of 51853321 is about 7200.9250100248. The cubic root of 51853321 is about 372.8998358220.

The spelling of 51853321 in words is "fifty-one million, eight hundred fifty-three thousand, three hundred twenty-one".