52149865 has 4 divisors (see below), whose sum is σ = 62579844. Its totient is φ = 41719888.

The previous prime is 52149857. The next prime is 52149871. The reversal of 52149865 is 56894125.

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 10830681 + 41319184 = 3291^2 + 6428^2 .

It is a cyclic number.

It is not a de Polignac number, because 52149865 - 2³ = 52149857 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5214982 + ... + 5214991.

It is an arithmetic number, because the mean of its divisors is an integer number (15644961).

Almost surely, 2^52149865 is an apocalyptic number.

It is an amenable number.

52149865 is a deficient number, since it is larger than the sum of its proper divisors (10429979).

52149865 is a wasteful number, since it uses less digits than its factorization.

52149865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10429978.

The product of its digits is 86400, while the sum is 40.

The square root of 52149865 is about 7221.4863428521. The cubic root of 52149865 is about 373.6093440592.

The spelling of 52149865 in words is "fifty-two million, one hundred forty-nine thousand, eight hundred sixty-five".