231533533310440 has 32 divisors (see below), whose sum is σ = 521060751125280. Its totient is φ = 92593804226112.

The previous prime is 231533533310437. The next prime is 231533533310447. The reversal of 231533533310440 is 44013335335132.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 231533533310393 and 231533533310402.

It is not an unprimeable number, because it can be changed into a prime (231533533310447) 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, 612593034 + ... + 612970873.

It is an arithmetic number, because the mean of its divisors is an integer number (16283148472665).

Almost surely, 2^{231533533310440} is an apocalyptic number.

231533533310440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231533533310440 is an abundant number, since it is smaller than the sum of its proper divisors (289527217814840).

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

231533533310440 is a wasteful number, since it uses less digits than its factorization.

231533533310440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225568641 (or 1225568637 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 40.

Adding to 231533533310440 its reverse (44013335335132), we get a palindrome (275546868645572).

The spelling of 231533533310440 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, five hundred thirty-three million, three hundred ten thousand, four hundred forty".