52782569 has 8 divisors (see below), whose sum is σ = 63871488. Its totient is φ = 42580800.

The previous prime is 52782563. The next prime is 52782571. The reversal of 52782569 is 96528725.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52782569 is a prime.

It is a super-2 number, since 2×52782569² = 5571999180479522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52782563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221657 + ... + 221894.

It is an arithmetic number, because the mean of its divisors is an integer number (7983936).

Almost surely, 2^52782569 is an apocalyptic number.

It is an amenable number.

52782569 is a deficient number, since it is larger than the sum of its proper divisors (11088919).

52782569 is a wasteful number, since it uses less digits than its factorization.

52782569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443575.

The product of its digits is 302400, while the sum is 44.

The square root of 52782569 is about 7265.1613196129. The cubic root of 52782569 is about 375.1142028467.

The spelling of 52782569 in words is "fifty-two million, seven hundred eighty-two thousand, five hundred sixty-nine".