2621245313 has 4 divisors (see below), whose sum is σ = 2634417600. Its totient is φ = 2608073028.

The previous prime is 2621245309. The next prime is 2621245343. The reversal of 2621245313 is 3135421262.

It is a happy number.

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 2621245313 - 2² = 2621245309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2621245343) 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, 6585845 + ... + 6586242.

It is an arithmetic number, because the mean of its divisors is an integer number (658604400).

Almost surely, 2^2621245313 is an apocalyptic number.

It is an amenable number.

2621245313 is a deficient number, since it is larger than the sum of its proper divisors (13172287).

2621245313 is a wasteful number, since it uses less digits than its factorization.

2621245313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13172286.

The product of its digits is 8640, while the sum is 29.

The square root of 2621245313 is about 51198.0987244644. The cubic root of 2621245313 is about 1378.8040666261.

Adding to 2621245313 its reverse (3135421262), we get a palindrome (5756666575).

The spelling of 2621245313 in words is "two billion, six hundred twenty-one million, two hundred forty-five thousand, three hundred thirteen".