231301616 has 80 divisors (see below), whose sum is σ = 575629824. Its totient is φ = 87512832.

The previous prime is 231301613. The next prime is 231301627. The reversal of 231301616 is 616103132.

It is a happy number.

231301616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231301616² = 107000875128422912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 231301591 and 231301600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231301613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30035 + ... + 36941.

Almost surely, 2^231301616 is an apocalyptic number.

231301616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231301616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287814912).

231301616 is an abundant number, since it is smaller than the sum of its proper divisors (344328208).

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

231301616 is a wasteful number, since it uses less digits than its factorization.

231301616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6958 (or 6952 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 231301616 is about 15208.6033546805. The cubic root of 231301616 is about 613.8461773417.

Adding to 231301616 its reverse (616103132), we get a palindrome (847404748).

The spelling of 231301616 in words is "two hundred thirty-one million, three hundred one thousand, six hundred sixteen".