2531544421 has 4 divisors (see below), whose sum is σ = 2893193632. Its totient is φ = 2169895212.

The previous prime is 2531544397. The next prime is 2531544437. The reversal of 2531544421 is 1244451352.

2531544421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2531544421 - 2⁹ = 2531543909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531544481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180824595 + ... + 180824608.

It is an arithmetic number, because the mean of its divisors is an integer number (723298408).

Almost surely, 2^2531544421 is an apocalyptic number.

It is an amenable number.

2531544421 is a deficient number, since it is larger than the sum of its proper divisors (361649211).

2531544421 is an equidigital number, since it uses as much as digits as its factorization.

2531544421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361649210.

The product of its digits is 19200, while the sum is 31.

The square root of 2531544421 is about 50314.4553880890. The cubic root of 2531544421 is about 1362.8932819299.

Adding to 2531544421 its reverse (1244451352), we get a palindrome (3775995773).

The spelling of 2531544421 in words is "two billion, five hundred thirty-one million, five hundred forty-four thousand, four hundred twenty-one".