52194509 has 4 divisors (see below), whose sum is σ = 52540320. Its totient is φ = 51848700.

The previous prime is 52194503. The next prime is 52194511. The reversal of 52194509 is 90549125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52194509 - 2²⁰ = 51145933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52194503) 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, 172679 + ... + 172980.

It is an arithmetic number, because the mean of its divisors is an integer number (13135080).

Almost surely, 2^52194509 is an apocalyptic number.

It is an amenable number.

52194509 is a deficient number, since it is larger than the sum of its proper divisors (345811).

52194509 is a wasteful number, since it uses less digits than its factorization.

52194509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345810.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 52194509 is about 7224.5767350067. The cubic root of 52194509 is about 373.7159257236.

The spelling of 52194509 in words is "fifty-two million, one hundred ninety-four thousand, five hundred nine".