52809919 has 4 divisors (see below), whose sum is σ = 53040760. Its totient is φ = 52579080.

The previous prime is 52809917. The next prime is 52809923. The reversal of 52809919 is 91990825.

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

It is a cyclic number.

It is not a de Polignac number, because 52809919 - 2¹ = 52809917 is a prime.

It is a super-2 number, since 2×52809919² = 5577775089573122, which contains 22 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 (52809917) 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, 115077 + ... + 115534.

It is an arithmetic number, because the mean of its divisors is an integer number (13260190).

Almost surely, 2^52809919 is an apocalyptic number.

52809919 is a deficient number, since it is larger than the sum of its proper divisors (230841).

52809919 is a wasteful number, since it uses less digits than its factorization.

52809919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230840.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 52809919 is about 7267.0433465062. The cubic root of 52809919 is about 375.1789818204.

The spelling of 52809919 in words is "fifty-two million, eight hundred nine thousand, nine hundred nineteen".