2557725571221 has 8 divisors (see below), whose sum is σ = 3520310463744. Its totient is φ = 1650145529760.

The previous prime is 2557725571201. The next prime is 2557725571249. The reversal of 2557725571221 is 1221755277552.

2557725571221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2557725571221 - 2¹⁸ = 2557725309077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557725571201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13751212656 + ... + 13751212841.

It is an arithmetic number, because the mean of its divisors is an integer number (440038807968).

Almost surely, 2^{2557725571221} is an apocalyptic number.

It is an amenable number.

2557725571221 is a deficient number, since it is larger than the sum of its proper divisors (962584892523).

2557725571221 is a wasteful number, since it uses less digits than its factorization.

2557725571221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27502425531.

The product of its digits is 3430000, while the sum is 51.

The spelling of 2557725571221 in words is "two trillion, five hundred fifty-seven billion, seven hundred twenty-five million, five hundred seventy-one thousand, two hundred twenty-one".