2251521313 has 4 divisors (see below), whose sum is σ = 2349413568. Its totient is φ = 2153629060.

The previous prime is 2251521301. The next prime is 2251521341. The reversal of 2251521313 is 3131251522.

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.

It is a cyclic number.

It is not a de Polignac number, because 2251521313 - 2¹⁷ = 2251390241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2251521353) 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, 48946093 + ... + 48946138.

It is an arithmetic number, because the mean of its divisors is an integer number (587353392).

Almost surely, 2^2251521313 is an apocalyptic number.

2251521313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2251521313 is a deficient number, since it is larger than the sum of its proper divisors (97892255).

2251521313 is an equidigital number, since it uses as much as digits as its factorization.

2251521313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97892254.

The product of its digits is 1800, while the sum is 25.

The square root of 2251521313 is about 47450.1982398388. The cubic root of 2251521313 is about 1310.6659615273.

Adding to 2251521313 its reverse (3131251522), we get a palindrome (5382772835).

The spelling of 2251521313 in words is "two billion, two hundred fifty-one million, five hundred twenty-one thousand, three hundred thirteen".