2657320321 has 4 divisors (see below), whose sum is σ = 2719118512. Its totient is φ = 2595522132.

The previous prime is 2657320301. The next prime is 2657320327. The reversal of 2657320321 is 1230237562.

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 2657320321 - 2⁹ = 2657319809 is a prime.

It is a super-2 number, since 2×2657320321² = 14122702576799086082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2657320327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30899031 + ... + 30899116.

It is an arithmetic number, because the mean of its divisors is an integer number (679779628).

Almost surely, 2^2657320321 is an apocalyptic number.

It is an amenable number.

2657320321 is a deficient number, since it is larger than the sum of its proper divisors (61798191).

2657320321 is an equidigital number, since it uses as much as digits as its factorization.

2657320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61798190.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 2657320321 is about 51549.2029133332. The cubic root of 2657320321 is about 1385.1005537216.

Adding to 2657320321 its reverse (1230237562), we get a palindrome (3887557883).

The spelling of 2657320321 in words is "two billion, six hundred fifty-seven million, three hundred twenty thousand, three hundred twenty-one".