123231616 has 16 divisors (see below), whose sum is σ = 245500740. Its totient is φ = 61615744.

The previous prime is 123231611. The next prime is 123231629. The reversal of 123231616 is 616132321.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123231611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 481246 + ... + 481501.

Almost surely, 2^123231616 is an apocalyptic number.

123231616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123231616 is a deficient number, since it is larger than the sum of its proper divisors (122269124).

123231616 is an frugal number, since it uses more digits than its factorization.

123231616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962761 (or 962749 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 123231616 is about 11100.9736509912. The cubic root of 123231616 is about 497.6309475760.

Adding to 123231616 its reverse (616132321), we get a palindrome (739363937).

The spelling of 123231616 in words is "one hundred twenty-three million, two hundred thirty-one thousand, six hundred sixteen".