52003561 has 4 divisors (see below), whose sum is σ = 55062612. Its totient is φ = 48944512.

The previous prime is 52003559. The next prime is 52003571. The reversal of 52003561 is 16530025.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31573161 + 20430400 = 5619^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 52003561 - 2¹ = 52003559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52003571) 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, 1529500 + ... + 1529533.

It is an arithmetic number, because the mean of its divisors is an integer number (13765653).

Almost surely, 2^52003561 is an apocalyptic number.

It is an amenable number.

52003561 is a deficient number, since it is larger than the sum of its proper divisors (3059051).

52003561 is a wasteful number, since it uses less digits than its factorization.

52003561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059050.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 52003561 is about 7211.3494576258. The cubic root of 52003561 is about 373.2596356617.

Adding to 52003561 its reverse (16530025), we get a palindrome (68533586).

The spelling of 52003561 in words is "fifty-two million, three thousand, five hundred sixty-one".