2265611531 has 4 divisors (see below), whose sum is σ = 2273790912. Its totient is φ = 2257432152.

The previous prime is 2265611521. The next prime is 2265611567. The reversal of 2265611531 is 1351165622.

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

It is a cyclic number.

It is not a de Polignac number, because 2265611531 - 2²² = 2261417227 is a prime.

It is a super-2 number, since 2×2265611531² = 10265991218800327922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2265611521) 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, 4089275 + ... + 4089828.

It is an arithmetic number, because the mean of its divisors is an integer number (568447728).

Almost surely, 2^2265611531 is an apocalyptic number.

2265611531 is a deficient number, since it is larger than the sum of its proper divisors (8179381).

2265611531 is an equidigital number, since it uses as much as digits as its factorization.

2265611531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8179380.

The product of its digits is 10800, while the sum is 32.

The square root of 2265611531 is about 47598.4404261316. The cubic root of 2265611531 is about 1313.3943654302.

The spelling of 2265611531 in words is "two billion, two hundred sixty-five million, six hundred eleven thousand, five hundred thirty-one".