231222132 has 18 divisors (see below), whose sum is σ = 584478258. Its totient is φ = 77074032.

The previous prime is 231222127. The next prime is 231222179.

231222132 is nontrivially palindromic in base 10.

231222132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 231161616 + 60516 = 15204^2 + 246^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3211383 + ... + 3211454.

Almost surely, 2^231222132 is an apocalyptic number.

It is an amenable number.

231222132 is an abundant number, since it is smaller than the sum of its proper divisors (353256126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231222132 is a wasteful number, since it uses less digits than its factorization.

231222132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6422847 (or 6422842 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 231222132 is about 15205.9900039425. The cubic root of 231222132 is about 613.7758556836.

The spelling of 231222132 in words is "two hundred thirty-one million, two hundred twenty-two thousand, one hundred thirty-two".