231519340 has 24 divisors (see below), whose sum is σ = 523590480. Its totient is φ = 85483968.

The previous prime is 231519307. The next prime is 231519341. The reversal of 231519340 is 43915132.

It is a junction number, because it is equal to n+sod(n) for n = 231519299 and 231519308.

It is not an unprimeable number, because it can be changed into a prime (231519341) 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, 444970 + ... + 445489.

It is an arithmetic number, because the mean of its divisors is an integer number (21816270).

Almost surely, 2^231519340 is an apocalyptic number.

231519340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231519340 is an abundant number, since it is smaller than the sum of its proper divisors (292071140).

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

231519340 is a wasteful number, since it uses less digits than its factorization.

231519340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890481 (or 890479 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 231519340 is about 15215.7595932638. The cubic root of 231519340 is about 614.0387212227.

The spelling of 231519340 in words is "two hundred thirty-one million, five hundred nineteen thousand, three hundred forty".