231354336040 has 64 divisors (see below), whose sum is σ = 528934242960. Its totient is φ = 91056752640.

The previous prime is 231354336001. The next prime is 231354336061. The reversal of 231354336040 is 40633453132.

231354336040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 337603876 + 231016732164 = 18374^2 + 480642^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231354335987 and 231354336005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1135222 + ... + 1323418.

Almost surely, 2^231354336040 is an apocalyptic number.

231354336040 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 231354336040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264467121480).

231354336040 is an abundant number, since it is smaller than the sum of its proper divisors (297579906920).

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

231354336040 is a wasteful number, since it uses less digits than its factorization.

231354336040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188702 (or 188698 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 34.

Adding to 231354336040 its reverse (40633453132), we get a palindrome (271987789172).

The spelling of 231354336040 in words is "two hundred thirty-one billion, three hundred fifty-four million, three hundred thirty-six thousand, forty".