231601616 has 20 divisors (see below), whose sum is σ = 449664672. Its totient is φ = 115559136.

The previous prime is 231601613. The next prime is 231601663. The reversal of 231601616 is 616106132.

231601616 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231601616² = 107278617067622912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231601613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7070 + ... + 22653.

Almost surely, 2^231601616 is an apocalyptic number.

It is an amenable number.

231601616 is a deficient number, since it is larger than the sum of its proper divisors (218063056).

231601616 is a wasteful number, since it uses less digits than its factorization.

231601616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30218 (or 30212 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 231601616 is about 15218.4629972938. The cubic root of 231601616 is about 614.1114504475. Note that the first 3 decimals are identical.

Adding to 231601616 its reverse (616106132), we get a palindrome (847707748).

The spelling of 231601616 in words is "two hundred thirty-one million, six hundred one thousand, six hundred sixteen".