61565255 has 8 divisors (see below), whose sum is σ = 73929024. Its totient is φ = 49218400.

The previous prime is 61565243. The next prime is 61565291. The reversal of 61565255 is 55256516.

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

It is not a de Polignac number, because 61565255 - 2¹⁰ = 61564231 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 7 ways as a sum of consecutive naturals, for example, 6065 + ... + 12645.

It is an arithmetic number, because the mean of its divisors is an integer number (9241128).

Almost surely, 2^61565255 is an apocalyptic number.

61565255 is a deficient number, since it is larger than the sum of its proper divisors (12363769).

61565255 is a wasteful number, since it uses less digits than its factorization.

61565255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8457.

The product of its digits is 45000, while the sum is 35.

The square root of 61565255 is about 7846.3529744716. The cubic root of 61565255 is about 394.8618969220.

It can be divided in two parts, 6156 and 5255, that added together give a palindrome (11411).

The spelling of 61565255 in words is "sixty-one million, five hundred sixty-five thousand, two hundred fifty-five".