231545355221040 has 160 divisors (see below), whose sum is σ = 820340927201280. Its totient is φ = 52924084134912.

The previous prime is 231545355220961. The next prime is 231545355221197. The reversal of 231545355221040 is 40122553545132.

It is a super-2 number, since 2×231545355221040² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 231545355220983 and 231545355221001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167022417 + ... + 168403023.

It is an arithmetic number, because the mean of its divisors is an integer number (5127130795008).

Almost surely, 2^{231545355221040} is an apocalyptic number.

231545355221040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231545355221040 is an abundant number, since it is smaller than the sum of its proper divisors (588795571980240).

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

231545355221040 is a wasteful number, since it uses less digits than its factorization.

231545355221040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480459 (or 1480453 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 42.

The spelling of 231545355221040 in words is "two hundred thirty-one trillion, five hundred forty-five billion, three hundred fifty-five million, two hundred twenty-one thousand, forty".