52621565 has 4 divisors (see below), whose sum is σ = 63145884. Its totient is φ = 42097248.

The previous prime is 52621559. The next prime is 52621571. The reversal of 52621565 is 56512625.

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

It is an interprime number because it is at equal distance from previous prime (52621559) and next prime (52621571).

It can be written as a sum of positive squares in 2 ways, for example, as 37613689 + 15007876 = 6133^2 + 3874^2 .

It is a cyclic number.

It is not a de Polignac number, because 52621565 - 2¹⁰ = 52620541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5262152 + ... + 5262161.

It is an arithmetic number, because the mean of its divisors is an integer number (15786471).

Almost surely, 2^52621565 is an apocalyptic number.

It is an amenable number.

52621565 is a deficient number, since it is larger than the sum of its proper divisors (10524319).

52621565 is a wasteful number, since it uses less digits than its factorization.

52621565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10524318.

The product of its digits is 18000, while the sum is 32.

The square root of 52621565 is about 7254.0723045749. The cubic root of 52621565 is about 374.7324076154.

The spelling of 52621565 in words is "fifty-two million, six hundred twenty-one thousand, five hundred sixty-five".