231013020 has 96 divisors (see below), whose sum is σ = 778176000. Its totient is φ = 50022144.

The previous prime is 231013009. The next prime is 231013031. The reversal of 231013020 is 20310132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (231013009) and next prime (231013031).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 231012987 and 231013005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6495 + ... + 22454.

It is an arithmetic number, because the mean of its divisors is an integer number (8106000).

Almost surely, 2^231013020 is an apocalyptic number.

231013020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231013020 is an abundant number, since it is smaller than the sum of its proper divisors (547162980).

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

231013020 is a wasteful number, since it uses less digits than its factorization.

231013020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28987 (or 28985 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 231013020 is about 15199.1124740887. The cubic root of 231013020 is about 613.5907716021.

Adding to 231013020 its reverse (20310132), we get a palindrome (251323152).

The spelling of 231013020 in words is "two hundred thirty-one million, thirteen thousand, twenty".