2261243264 has 32 divisors (see below), whose sum is σ = 5148368400. Its totient is φ = 969103872.

The previous prime is 2261243227. The next prime is 2261243311. The reversal of 2261243264 is 4623421622.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×2261243264² = 10226442197970747392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2261243264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1260959 + ... + 1262750.

Almost surely, 2^2261243264 is an apocalyptic number.

It is an amenable number.

2261243264 is an abundant number, since it is smaller than the sum of its proper divisors (2887125136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2261243264 is an equidigital number, since it uses as much as digits as its factorization.

2261243264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523730 (or 2523718 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 2261243264 is about 47552.5316255612. The cubic root of 2261243264 is about 1312.5497151116.

Adding to 2261243264 its reverse (4623421622), we get a palindrome (6884664886).

The spelling of 2261243264 in words is "two billion, two hundred sixty-one million, two hundred forty-three thousand, two hundred sixty-four".