231073540 has 24 divisors (see below), whose sum is σ = 497091672. Its totient is φ = 90174720.

The previous prime is 231073517. The next prime is 231073567. The reversal of 231073540 is 45370132.

231073540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 276676 + 230796864 = 526^2 + 15192^2 .

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, 140079 + ... + 141718.

It is an arithmetic number, because the mean of its divisors is an integer number (20712153).

Almost surely, 2^231073540 is an apocalyptic number.

231073540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231073540 is an abundant number, since it is smaller than the sum of its proper divisors (266018132).

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

231073540 is a wasteful number, since it uses less digits than its factorization.

231073540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281847 (or 281845 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 231073540 is about 15201.1032494355. The cubic root of 231073540 is about 613.6443490602.

The spelling of 231073540 in words is "two hundred thirty-one million, seventy-three thousand, five hundred forty".