231500020 has 24 divisors (see below), whose sum is σ = 492307200. Its totient is φ = 91427232.

The previous prime is 231499969. The next prime is 231500023. The reversal of 231500020 is 20005132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231500023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71680 + ... + 74839.

It is an arithmetic number, because the mean of its divisors is an integer number (20512800).

Almost surely, 2^231500020 is an apocalyptic number.

231500020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231500020 is an abundant number, since it is smaller than the sum of its proper divisors (260807180).

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

231500020 is a wasteful number, since it uses less digits than its factorization.

231500020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146607 (or 146605 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 231500020 is about 15215.1247119437. The cubic root of 231500020 is about 614.0216404925.

Adding to 231500020 its reverse (20005132), we get a palindrome (251505152).

The spelling of 231500020 in words is "two hundred thirty-one million, five hundred thousand, twenty".