231364221 has 48 divisors (see below), whose sum is σ = 353009664. Its totient is φ = 134596000.

The previous prime is 231364213. The next prime is 231364283. The reversal of 231364221 is 122463132.

It is not a de Polignac number, because 231364221 - 2³ = 231364213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231364191 and 231364200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231364321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1211236 + ... + 1211426.

It is an arithmetic number, because the mean of its divisors is an integer number (7354368).

Almost surely, 2^231364221 is an apocalyptic number.

It is an amenable number.

231364221 is a deficient number, since it is larger than the sum of its proper divisors (121645443).

231364221 is a wasteful number, since it uses less digits than its factorization.

231364221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 323 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 231364221 is about 15210.6614254608. The cubic root of 231364221 is about 613.9015543482.

The spelling of 231364221 in words is "two hundred thirty-one million, three hundred sixty-four thousand, two hundred twenty-one".