231452253540 has 36 divisors (see below), whose sum is σ = 702071836284. Its totient is φ = 61720600896.

The previous prime is 231452253523. The next prime is 231452253541. The reversal of 231452253540 is 45352254132.

231452253540 is a `hidden beast` number, since 2 + 3 + 1 + 45 + 22 + 53 + 540 = 666.

231452253540 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 2 ways, for example, as 65970895104 + 165481358436 = 256848^2 + 406794^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 231452253495 and 231452253504.

It is not an unprimeable number, because it can be changed into a prime (231452253541) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 642922747 + ... + 642923106.

Almost surely, 2^231452253540 is an apocalyptic number.

231452253540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231452253540 is an abundant number, since it is smaller than the sum of its proper divisors (470619582744).

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

231452253540 is a wasteful number, since it uses less digits than its factorization.

231452253540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285845868 (or 1285845863 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The spelling of 231452253540 in words is "two hundred thirty-one billion, four hundred fifty-two million, two hundred fifty-three thousand, five hundred forty".