2557336321 has 8 divisors (see below), whose sum is σ = 2568141288. Its totient is φ = 2546544000.

The previous prime is 2557336303. The next prime is 2557336349. The reversal of 2557336321 is 1236337552.

It can be written as a sum of positive squares in 4 ways, for example, as 166126321 + 2391210000 = 12889^2 + 48900^2 .

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 2557336321 - 2⁷ = 2557336193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557336381) 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, 802351 + ... + 805531.

It is an arithmetic number, because the mean of its divisors is an integer number (321017661).

Almost surely, 2^2557336321 is an apocalyptic number.

It is an amenable number.

2557336321 is a deficient number, since it is larger than the sum of its proper divisors (10804967).

2557336321 is a wasteful number, since it uses less digits than its factorization.

2557336321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323.

The product of its digits is 113400, while the sum is 37.

The square root of 2557336321 is about 50570.1129225554. The cubic root of 2557336321 is about 1367.5061315394.

The spelling of 2557336321 in words is "two billion, five hundred fifty-seven million, three hundred thirty-six thousand, three hundred twenty-one".