2245619521 has 4 divisors (see below), whose sum is σ = 2249608752. Its totient is φ = 2241630292.

The previous prime is 2245619479. The next prime is 2245619543. The reversal of 2245619521 is 1259165422.

2245619521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 1259165422 = 2 ⋅629582711.

It is a cyclic number.

It is not a de Polignac number, because 2245619521 - 2⁷ = 2245619393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2245619561) 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, 1993771 + ... + 1994896.

It is an arithmetic number, because the mean of its divisors is an integer number (562402188).

Almost surely, 2^2245619521 is an apocalyptic number.

It is an amenable number.

2245619521 is a deficient number, since it is larger than the sum of its proper divisors (3989231).

2245619521 is an equidigital number, since it uses as much as digits as its factorization.

2245619521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989230.

The product of its digits is 43200, while the sum is 37.

The square root of 2245619521 is about 47387.9681037286. The cubic root of 2245619521 is about 1309.5197666722.

It can be divided in two parts, 2245619 and 521, that added together give a triangular number (2246140 = T₂₁₁₉).

The spelling of 2245619521 in words is "two billion, two hundred forty-five million, six hundred nineteen thousand, five hundred twenty-one".