231522141 has 16 divisors (see below), whose sum is σ = 316041984. Its totient is φ = 150691584.

The previous prime is 231522139. The next prime is 231522169. The reversal of 231522141 is 141225132.

It is not a de Polignac number, because 231522141 - 2¹ = 231522139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231522241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62641 + ... + 66233.

It is an arithmetic number, because the mean of its divisors is an integer number (19752624).

Almost surely, 2^231522141 is an apocalyptic number.

It is an amenable number.

231522141 is a deficient number, since it is larger than the sum of its proper divisors (84519843).

231522141 is a wasteful number, since it uses less digits than its factorization.

231522141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4100.

The product of its digits is 480, while the sum is 21.

The square root of 231522141 is about 15215.8516357120. The cubic root of 231522141 is about 614.0411974960.

Adding to 231522141 its reverse (141225132), we get a palindrome (372747273).

The spelling of 231522141 in words is "two hundred thirty-one million, five hundred twenty-two thousand, one hundred forty-one".