53851865 has 8 divisors (see below), whose sum is σ = 64676040. Its totient is φ = 43045632.

The previous prime is 53851849. The next prime is 53851879. The reversal of 53851865 is 56815835.

It can be written as a sum of positive squares in 4 ways, for example, as 34969 + 53816896 = 187^2 + 7336^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 53851865 - 2⁴ = 53851849 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3377 + ... + 10913.

It is an arithmetic number, because the mean of its divisors is an integer number (8084505).

Almost surely, 2^53851865 is an apocalyptic number.

It is an amenable number.

53851865 is a deficient number, since it is larger than the sum of its proper divisors (10824175).

53851865 is a wasteful number, since it uses less digits than its factorization.

53851865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8971.

The product of its digits is 144000, while the sum is 41.

The square root of 53851865 is about 7338.3829962738. The cubic root of 53851865 is about 377.6303717648.

The spelling of 53851865 in words is "fifty-three million, eight hundred fifty-one thousand, eight hundred sixty-five".