231221162 has 16 divisors (see below), whose sum is σ = 363820032. Its totient is φ = 110000880.

The previous prime is 231221129. The next prime is 231221167. The reversal of 231221162 is 261122132.

231221162 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231221167) 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, 4373 + ... + 21944.

It is an arithmetic number, because the mean of its divisors is an integer number (22738752).

Almost surely, 2^231221162 is an apocalyptic number.

231221162 is a deficient number, since it is larger than the sum of its proper divisors (132598870).

231221162 is a wasteful number, since it uses less digits than its factorization.

231221162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26533.

The product of its digits is 288, while the sum is 20.

The square root of 231221162 is about 15205.9581085836. The cubic root of 231221162 is about 613.7749973987.

Adding to 231221162 its reverse (261122132), we get a palindrome (492343294).

The spelling of 231221162 in words is "two hundred thirty-one million, two hundred twenty-one thousand, one hundred sixty-two".