2531532221 has 8 divisors (see below), whose sum is σ = 2571371040. Its totient is φ = 2491753968.

The previous prime is 2531532197. The next prime is 2531532229. The reversal of 2531532221 is 1222351352.

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 2531532221 - 2¹⁴ = 2531515837 is a prime.

It is a super-2 number, since 2×2531532221² = 12817310771922385682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531532229) 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, 73115 + ... + 102023.

It is an arithmetic number, because the mean of its divisors is an integer number (321421380).

Almost surely, 2^2531532221 is an apocalyptic number.

It is an amenable number.

2531532221 is a deficient number, since it is larger than the sum of its proper divisors (39838819).

2531532221 is a wasteful number, since it uses less digits than its factorization.

2531532221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30283.

The product of its digits is 3600, while the sum is 26.

The square root of 2531532221 is about 50314.3341504188. The cubic root of 2531532221 is about 1362.8910925780.

Adding to 2531532221 its reverse (1222351352), we get a palindrome (3753883573).

The spelling of 2531532221 in words is "two billion, five hundred thirty-one million, five hundred thirty-two thousand, two hundred twenty-one".