231441216 has 56 divisors (see below), whose sum is σ = 628924320. Its totient is φ = 75059712.

The previous prime is 231441181. The next prime is 231441227. The reversal of 231441216 is 612144132.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 7 ways as a sum of consecutive naturals, for example, 9186 + ... + 23393.

Almost surely, 2^231441216 is an apocalyptic number.

It is an amenable number.

231441216 is an abundant number, since it is smaller than the sum of its proper divisors (397483104).

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

231441216 is a wasteful number, since it uses less digits than its factorization.

231441216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32631 (or 32621 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 231441216 is about 15213.1921699557. The cubic root of 231441216 is about 613.9696462764.

Adding to 231441216 its reverse (612144132), we get a palindrome (843585348).

The spelling of 231441216 in words is "two hundred thirty-one million, four hundred forty-one thousand, two hundred sixteen".