52089561 has 10 divisors (see below), whose sum is σ = 77812922. Its totient is φ = 34726320.

The previous prime is 52089559. The next prime is 52089563. The reversal of 52089561 is 16598025.

It is a happy number.

52089561 is a `hidden beast` number, since 520 + 89 + 56 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (52089559) and next prime (52089563).

It can be written as a sum of positive squares in only one way, i.e., 44355600 + 7733961 = 6660^2 + 2781^2 .

It is not a de Polignac number, because 52089561 - 2¹ = 52089559 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52089563) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 321460 + ... + 321621.

Almost surely, 2^52089561 is an apocalyptic number.

It is an amenable number.

52089561 is a deficient number, since it is larger than the sum of its proper divisors (25723361).

52089561 is an equidigital number, since it uses as much as digits as its factorization.

52089561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643093 (or 643084 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 52089561 is about 7217.3098173766. The cubic root of 52089561 is about 373.4652795905.

It can be divided in two parts, 52089 and 561, that added together give a triangular number (52650 = T₃₂₄).

The spelling of 52089561 in words is "fifty-two million, eighty-nine thousand, five hundred sixty-one".