52651561 has 4 divisors (see below), whose sum is σ = 52793092. Its totient is φ = 52510032.

The previous prime is 52651553. The next prime is 52651579. The reversal of 52651561 is 16515625.

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 28944400 + 23707161 = 5380^2 + 4869^2 .

It is a cyclic number.

It is not a de Polignac number, because 52651561 - 2³ = 52651553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52651961) 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, 70206 + ... + 70951.

It is an arithmetic number, because the mean of its divisors is an integer number (13198273).

Almost surely, 2^52651561 is an apocalyptic number.

It is an amenable number.

52651561 is a deficient number, since it is larger than the sum of its proper divisors (141531).

52651561 is a wasteful number, since it uses less digits than its factorization.

52651561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141530.

The product of its digits is 9000, while the sum is 31.

The square root of 52651561 is about 7256.1395383496. The cubic root of 52651561 is about 374.8035973021.

The spelling of 52651561 in words is "fifty-two million, six hundred fifty-one thousand, five hundred sixty-one".