2556411421 has 8 divisors (see below), whose sum is σ = 2581574688. Its totient is φ = 2531334000.

The previous prime is 2556411401. The next prime is 2556411433. The reversal of 2556411421 is 1241146552.

It is a happy number.

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 2556411421 - 2⁷ = 2556411293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556411401) 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, 39226 + ... + 81556.

It is an arithmetic number, because the mean of its divisors is an integer number (322696836).

Almost surely, 2^2556411421 is an apocalyptic number.

It is an amenable number.

2556411421 is a deficient number, since it is larger than the sum of its proper divisors (25163267).

2556411421 is a wasteful number, since it uses less digits than its factorization.

2556411421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42923.

The product of its digits is 9600, while the sum is 31.

The square root of 2556411421 is about 50560.9673661412. The cubic root of 2556411421 is about 1367.3412517880.

Adding to 2556411421 its reverse (1241146552), we get a palindrome (3797557973).

The spelling of 2556411421 in words is "two billion, five hundred fifty-six million, four hundred eleven thousand, four hundred twenty-one".