531353221 has 16 divisors (see below), whose sum is σ = 643536000. Its totient is φ = 428563008.

The previous prime is 531353213. The next prime is 531353227. The reversal of 531353221 is 122353135.

It is a cyclic number.

It is not a de Polignac number, because 531353221 - 2³ = 531353213 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 (531353227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6411 + ... + 33223.

It is an arithmetic number, because the mean of its divisors is an integer number (40221000).

Almost surely, 2^531353221 is an apocalyptic number.

It is an amenable number.

531353221 is a deficient number, since it is larger than the sum of its proper divisors (112182779).

531353221 is a wasteful number, since it uses less digits than its factorization.

531353221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26988.

The product of its digits is 2700, while the sum is 25.

The square root of 531353221 is about 23051.1002123543. The cubic root of 531353221 is about 809.9554011922.

The spelling of 531353221 in words is "five hundred thirty-one million, three hundred fifty-three thousand, two hundred twenty-one".