231445020 has 24 divisors (see below), whose sum is σ = 648046224. Its totient is φ = 61718656.

The previous prime is 231445013. The next prime is 231445043. The reversal of 231445020 is 20544132.

231445020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1928649 + ... + 1928768.

It is an arithmetic number, because the mean of its divisors is an integer number (27001926).

Almost surely, 2^231445020 is an apocalyptic number.

231445020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231445020 is an abundant number, since it is smaller than the sum of its proper divisors (416601204).

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

231445020 is a wasteful number, since it uses less digits than its factorization.

231445020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857429 (or 3857427 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 231445020 is about 15213.3171925126. The cubic root of 231445020 is about 613.9730100215.

Adding to 231445020 its reverse (20544132), we get a palindrome (251989152).

The spelling of 231445020 in words is "two hundred thirty-one million, four hundred forty-five thousand, twenty".