5161565 has 8 divisors (see below), whose sum is σ = 6407640. Its totient is φ = 3986752.

The previous prime is 5161561. The next prime is 5161567. The reversal of 5161565 is 5651615.

It can be written as a sum of positive squares in 4 ways, for example, as 63001 + 5098564 = 251^2 + 2258^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5161565 - 2² = 5161561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5161561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17654 + ... + 17943.

It is an arithmetic number, because the mean of its divisors is an integer number (800955).

Almost surely, 2^5161565 is an apocalyptic number.

It is an amenable number.

5161565 is a deficient number, since it is larger than the sum of its proper divisors (1246075).

5161565 is a wasteful number, since it uses less digits than its factorization.

5161565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35631.

The product of its digits is 4500, while the sum is 29.

The square root of 5161565 is about 2271.9077886217. The cubic root of 5161565 is about 172.8199202037.

It can be divided in two parts, 51 and 61565, that added together give a palindrome (61616).

The spelling of 5161565 in words is "five million, one hundred sixty-one thousand, five hundred sixty-five".