2261304641 has 4 divisors (see below), whose sum is σ = 2334249984. Its totient is φ = 2188359300.

The previous prime is 2261304629. The next prime is 2261304649. The reversal of 2261304641 is 1464031622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1464031622 = 2 ⋅732015811.

It is a cyclic number.

It is not a de Polignac number, because 2261304641 - 2¹⁰ = 2261303617 is a prime.

It is a super-3 number, since 3×2261304641³ (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 not an unprimeable number, because it can be changed into a prime (2261304649) 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, 36472625 + ... + 36472686.

It is an arithmetic number, because the mean of its divisors is an integer number (583562496).

Almost surely, 2^2261304641 is an apocalyptic number.

It is an amenable number.

2261304641 is a deficient number, since it is larger than the sum of its proper divisors (72945343).

2261304641 is an equidigital number, since it uses as much as digits as its factorization.

2261304641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72945342.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 2261304641 is about 47553.1769811440. The cubic root of 2261304641 is about 1312.5615905308.

The spelling of 2261304641 in words is "two billion, two hundred sixty-one million, three hundred four thousand, six hundred forty-one".