2531534221 has 8 divisors (see below), whose sum is σ = 2573835264. Its totient is φ = 2489259120.

The previous prime is 2531534219. The next prime is 2531534251. The reversal of 2531534221 is 1224351352.

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 2531534221 - 2¹ = 2531534219 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 2531534221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531534251) 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, 365436 + ... + 372298.

It is an arithmetic number, because the mean of its divisors is an integer number (321729408).

Almost surely, 2^2531534221 is an apocalyptic number.

It is an amenable number.

2531534221 is a deficient number, since it is larger than the sum of its proper divisors (42301043).

2531534221 is an equidigital number, since it uses as much as digits as its factorization.

2531534221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12971.

The product of its digits is 7200, while the sum is 28.

The square root of 2531534221 is about 50314.3540254667. The cubic root of 2531534221 is about 1362.8914514886.

Adding to 2531534221 its reverse (1224351352), we get a palindrome (3755885573).

It can be divided in two parts, 25315 and 34221, that added together give a square (59536 = 244²).

The spelling of 2531534221 in words is "two billion, five hundred thirty-one million, five hundred thirty-four thousand, two hundred twenty-one".