231020016 has 40 divisors (see below), whose sum is σ = 604366080. Its totient is φ = 76030656.

The previous prime is 231019991. The next prime is 231020047. The reversal of 231020016 is 610020132.

231020016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231019977 and 231020004.

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, 26670 + ... + 34253.

It is an arithmetic number, because the mean of its divisors is an integer number (15109152).

Almost surely, 2^231020016 is an apocalyptic number.

It is an amenable number.

231020016 is an abundant number, since it is smaller than the sum of its proper divisors (373346064).

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

231020016 is a wasteful number, since it uses less digits than its factorization.

231020016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61013 (or 61007 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231020016 is about 15199.3426173634. The cubic root of 231020016 is about 613.5969655354.

Adding to 231020016 its reverse (610020132), we get a palindrome (841040148).

The spelling of 231020016 in words is "two hundred thirty-one million, twenty thousand, sixteen".