52440561 has 16 divisors (see below), whose sum is σ = 80197120. Its totient is φ = 33832080.

The previous prime is 52440547. The next prime is 52440571. The reversal of 52440561 is 16504425.

It is not a de Polignac number, because 52440561 - 2¹⁰ = 52439537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52440511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30490 + ... + 32163.

It is an arithmetic number, because the mean of its divisors is an integer number (5012320).

Almost surely, 2^52440561 is an apocalyptic number.

It is an amenable number.

52440561 is a deficient number, since it is larger than the sum of its proper divisors (27756559).

52440561 is a wasteful number, since it uses less digits than its factorization.

52440561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62693 (or 62687 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 52440561 is about 7241.5855308075. The cubic root of 52440561 is about 374.3022545419.

Adding to 52440561 its reverse (16504425), we get a palindrome (68944986).

The spelling of 52440561 in words is "fifty-two million, four hundred forty thousand, five hundred sixty-one".