2557544421 has 8 divisors (see below), whose sum is σ = 3410415904. Its totient is φ = 1704851280.

The previous prime is 2557544417. The next prime is 2557544443. The reversal of 2557544421 is 1244457552.

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

It is not a de Polignac number, because 2557544421 - 2² = 2557544417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2557544421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557544401) 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, 6466 + ... + 71811.

It is an arithmetic number, because the mean of its divisors is an integer number (426301988).

Almost surely, 2^2557544421 is an apocalyptic number.

It is an amenable number.

2557544421 is a deficient number, since it is larger than the sum of its proper divisors (852871483).

2557544421 is a wasteful number, since it uses less digits than its factorization.

2557544421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89171.

The product of its digits is 224000, while the sum is 39.

The square root of 2557544421 is about 50572.1704201036. The cubic root of 2557544421 is about 1367.5432235591.

It can be divided in two parts, 25575 and 44421, that added together give a palindrome (69996).

The spelling of 2557544421 in words is "two billion, five hundred fifty-seven million, five hundred forty-four thousand, four hundred twenty-one".