2249387521 has 8 divisors (see below), whose sum is σ = 2382151464. Its totient is φ = 2116673280.

The previous prime is 2249387501. The next prime is 2249387527. The reversal of 2249387521 is 1257839422.

It can be written as a sum of positive squares in 4 ways, for example, as 354004225 + 1895383296 = 18815^2 + 43536^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2249387521 - 2⁹ = 2249387009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2249387527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123051 + ... + 140143.

It is an arithmetic number, because the mean of its divisors is an integer number (297768933).

Almost surely, 2^2249387521 is an apocalyptic number.

It is an amenable number.

2249387521 is a deficient number, since it is larger than the sum of its proper divisors (132763943).

2249387521 is a wasteful number, since it uses less digits than its factorization.

2249387521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24851.

The product of its digits is 241920, while the sum is 43.

The square root of 2249387521 is about 47427.7083675777. The cubic root of 2249387521 is about 1310.2517863831.

The spelling of 2249387521 in words is "two billion, two hundred forty-nine million, three hundred eighty-seven thousand, five hundred twenty-one".