2251611266 has 12 divisors (see below), whose sum is σ = 3530647302. Its totient is φ = 1076857056.

The previous prime is 2251611247. The next prime is 2251611269. The reversal of 2251611266 is 6621161522.

It can be written as a sum of positive squares in only one way, i.e., 1855800241 + 395811025 = 43079^2 + 19895^2 .

It is not an unprimeable number, because it can be changed into a prime (2251611269) 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 5 ways as a sum of consecutive naturals, for example, 1063031 + ... + 1065146.

Almost surely, 2^2251611266 is an apocalyptic number.

2251611266 is a deficient number, since it is larger than the sum of its proper divisors (1279036036).

2251611266 is a wasteful number, since it uses less digits than its factorization.

2251611266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128225 (or 2128202 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 2251611266 is about 47451.1460978552. The cubic root of 2251611266 is about 1310.6834159131.

Adding to 2251611266 its reverse (6621161522), we get a palindrome (8872772788).

The spelling of 2251611266 in words is "two billion, two hundred fifty-one million, six hundred eleven thousand, two hundred sixty-six".