52561281 has 4 divisors (see below), whose sum is σ = 70081712. Its totient is φ = 35040852.

The previous prime is 52561247. The next prime is 52561343. The reversal of 52561281 is 18216525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 52561281 - 2¹⁰ = 52560257 is a prime.

It is a super-2 number, since 2×52561281² = 5525376520721922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52561211) 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, 8760211 + ... + 8760216.

It is an arithmetic number, because the mean of its divisors is an integer number (17520428).

Almost surely, 2^52561281 is an apocalyptic number.

It is an amenable number.

52561281 is a deficient number, since it is larger than the sum of its proper divisors (17520431).

52561281 is a wasteful number, since it uses less digits than its factorization.

52561281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17520430.

The product of its digits is 4800, while the sum is 30.

The square root of 52561281 is about 7249.9159305471. The cubic root of 52561281 is about 374.5892533746.

The spelling of 52561281 in words is "fifty-two million, five hundred sixty-one thousand, two hundred eighty-one".