231545434320355 has 4 divisors (see below), whose sum is σ = 277854521184432. Its totient is φ = 185236347456280.

The previous prime is 231545434320341. The next prime is 231545434320371. The reversal of 231545434320355 is 553023434545132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 231545434320355 - 2²³ = 231545425931747 is a prime.

It is a super-2 number, since 2×231545434320355² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231545434320299 and 231545434320308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23154543432031 + ... + 23154543432040.

It is an arithmetic number, because the mean of its divisors is an integer number (69463630296108).

Almost surely, 2^{231545434320355} is an apocalyptic number.

231545434320355 is a deficient number, since it is larger than the sum of its proper divisors (46309086864077).

231545434320355 is an equidigital number, since it uses as much as digits as its factorization.

231545434320355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46309086864076.

The product of its (nonzero) digits is 12960000, while the sum is 49.

Adding to 231545434320355 its reverse (553023434545132), we get a palindrome (784568868865487).

The spelling of 231545434320355 in words is "two hundred thirty-one trillion, five hundred forty-five billion, four hundred thirty-four million, three hundred twenty thousand, three hundred fifty-five".