52565989 has 32 divisors (see below), whose sum is σ = 68152320. Its totient is φ = 39460608.

The previous prime is 52565963. The next prime is 52566001. The reversal of 52565989 is 98956525.

52565989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 52565989 - 2²³ = 44177381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52545989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151314 + ... + 151660.

It is an arithmetic number, because the mean of its divisors is an integer number (2129760).

Almost surely, 2^52565989 is an apocalyptic number.

It is an amenable number.

52565989 is a deficient number, since it is larger than the sum of its proper divisors (15586331).

52565989 is a wasteful number, since it uses less digits than its factorization.

52565989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457.

The product of its digits is 972000, while the sum is 49.

The square root of 52565989 is about 7250.2406166968. The cubic root of 52565989 is about 374.6004372316.

The spelling of 52565989 in words is "fifty-two million, five hundred sixty-five thousand, nine hundred eighty-nine".