231301620 has 72 divisors (see below), whose sum is σ = 765404640. Its totient is φ = 56072640.

The previous prime is 231301613. The next prime is 231301627. The reversal of 231301620 is 26103132.

It is an interprime number because it is at equal distance from previous prime (231301613) and next prime (231301627).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231301593 and 231301602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231301627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56430 + ... + 60389.

It is an arithmetic number, because the mean of its divisors is an integer number (10630620).

Almost surely, 2^231301620 is an apocalyptic number.

231301620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231301620 is an abundant number, since it is smaller than the sum of its proper divisors (534103020).

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

231301620 is a wasteful number, since it uses less digits than its factorization.

231301620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116845 (or 116840 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 231301620 is about 15208.6034861850. The cubic root of 231301620 is about 613.8461808802.

Adding to 231301620 its reverse (26103132), we get a palindrome (257404752).

The spelling of 231301620 in words is "two hundred thirty-one million, three hundred one thousand, six hundred twenty".