2231561365 has 8 divisors (see below), whose sum is σ = 2921316768. Its totient is φ = 1622953680.

The previous prime is 2231561303. The next prime is 2231561369. The reversal of 2231561365 is 5631651322.

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

It is not a de Polignac number, because 2231561365 - 2¹⁵ = 2231528597 is a prime.

It is a super-3 number, since 3×2231561365³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2231561365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231561369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20286867 + ... + 20286976.

It is an arithmetic number, because the mean of its divisors is an integer number (365164596).

Almost surely, 2^2231561365 is an apocalyptic number.

It is an amenable number.

2231561365 is a deficient number, since it is larger than the sum of its proper divisors (689755403).

2231561365 is a wasteful number, since it uses less digits than its factorization.

2231561365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40573859.

The product of its digits is 32400, while the sum is 34.

The square root of 2231561365 is about 47239.4047909158. The cubic root of 2231561365 is about 1306.7814008464.

The spelling of 2231561365 in words is "two billion, two hundred thirty-one million, five hundred sixty-one thousand, three hundred sixty-five".