231453245240 has 128 divisors (see below), whose sum is σ = 606341376000. Its totient is φ = 77870128128.

The previous prime is 231453245237. The next prime is 231453245249. The reversal of 231453245240 is 42542354132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 231453245240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231453245249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9387569 + ... + 9412191.

It is an arithmetic number, because the mean of its divisors is an integer number (4737042000).

Almost surely, 2^231453245240 is an apocalyptic number.

231453245240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231453245240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303170688000).

231453245240 is an abundant number, since it is smaller than the sum of its proper divisors (374888130760).

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

231453245240 is a wasteful number, since it uses less digits than its factorization.

231453245240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25269 (or 25265 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 231453245240 its reverse (42542354132), we get a palindrome (273995599372).

The spelling of 231453245240 in words is "two hundred thirty-one billion, four hundred fifty-three million, two hundred forty-five thousand, two hundred forty".