52563391 has 4 divisors (see below), whose sum is σ = 52838784. Its totient is φ = 52288000.

The previous prime is 52563389. The next prime is 52563409. The reversal of 52563391 is 19336525.

It is a happy number.

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 52563391 - 2¹ = 52563389 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 (52563491) 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, 137410 + ... + 137791.

It is an arithmetic number, because the mean of its divisors is an integer number (13209696).

Almost surely, 2^52563391 is an apocalyptic number.

52563391 is a deficient number, since it is larger than the sum of its proper divisors (275393).

52563391 is a wasteful number, since it uses less digits than its factorization.

52563391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275392.

The product of its digits is 24300, while the sum is 34.

The square root of 52563391 is about 7250.0614480155. The cubic root of 52563391 is about 374.5942657635.

The spelling of 52563391 in words is "fifty-two million, five hundred sixty-three thousand, three hundred ninety-one".