231570340 has 12 divisors (see below), whose sum is σ = 486297756. Its totient is φ = 92628128.

The previous prime is 231570329. The next prime is 231570343. The reversal of 231570340 is 43075132.

It can be written as a sum of positive squares in 2 ways, for example, as 43112356 + 188457984 = 6566^2 + 13728^2 .

It is not an unprimeable number, because it can be changed into a prime (231570343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5789239 + ... + 5789278.

It is an arithmetic number, because the mean of its divisors is an integer number (40524813).

Almost surely, 2^231570340 is an apocalyptic number.

231570340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231570340 is an abundant number, since it is smaller than the sum of its proper divisors (254727416).

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

231570340 is a wasteful number, since it uses less digits than its factorization.

231570340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11578526 (or 11578524 counting only the distinct ones).

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

The square root of 231570340 is about 15217.4353949672. The cubic root of 231570340 is about 614.0838055420.

The spelling of 231570340 in words is "two hundred thirty-one million, five hundred seventy thousand, three hundred forty".