2266528991 has 4 divisors (see below), whose sum is σ = 2266811232. Its totient is φ = 2266246752.

The previous prime is 2266528969. The next prime is 2266529021. The reversal of 2266528991 is 1998256622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1998256622 = 2 ⋅999128311.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2266528991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2266528921) 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, 128711 + ... + 145256.

It is an arithmetic number, because the mean of its divisors is an integer number (566702808).

Almost surely, 2^2266528991 is an apocalyptic number.

2266528991 is a deficient number, since it is larger than the sum of its proper divisors (282241).

2266528991 is an equidigital number, since it uses as much as digits as its factorization.

2266528991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282240.

The product of its digits is 933120, while the sum is 50.

The square root of 2266528991 is about 47608.0769512905. The cubic root of 2266528991 is about 1313.5716279723.

The spelling of 2266528991 in words is "two billion, two hundred sixty-six million, five hundred twenty-eight thousand, nine hundred ninety-one".