231611332 has 12 divisors (see below), whose sum is σ = 429162300. Its totient is φ = 108993536.

The previous prime is 231611309. The next prime is 231611333. The reversal of 231611332 is 233116132.

It can be written as a sum of positive squares in 2 ways, for example, as 208340356 + 23270976 = 14434^2 + 4824^2 .

It is a super-2 number, since 2×231611332² = 107287618221628448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231611333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702957 + ... + 1703092.

It is an arithmetic number, because the mean of its divisors is an integer number (35763525).

Almost surely, 2^231611332 is an apocalyptic number.

It is an amenable number.

231611332 is a deficient number, since it is larger than the sum of its proper divisors (197550968).

231611332 is a wasteful number, since it uses less digits than its factorization.

231611332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406070 (or 3406068 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

The square root of 231611332 is about 15218.7822114649. The cubic root of 231611332 is about 614.1200379285.

Adding to 231611332 its reverse (233116132), we get a palindrome (464727464).

The spelling of 231611332 in words is "two hundred thirty-one million, six hundred eleven thousand, three hundred thirty-two".