231215106425605 has 4 divisors (see below), whose sum is σ = 277458127710732. Its totient is φ = 184972085140480.

The previous prime is 231215106425591. The next prime is 231215106425659. The reversal of 231215106425605 is 506524601512132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 172540992456196 + 58674113969409 = 13135486^2 + 7659903^2 .

It is not a de Polignac number, because 231215106425605 - 2²⁵ = 231215072871173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23121510642556 + ... + 23121510642565.

It is an arithmetic number, because the mean of its divisors is an integer number (69364531927683).

Almost surely, 2^{231215106425605} is an apocalyptic number.

It is an amenable number.

231215106425605 is a deficient number, since it is larger than the sum of its proper divisors (46243021285127).

231215106425605 is an equidigital number, since it uses as much as digits as its factorization.

231215106425605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46243021285126.

The product of its (nonzero) digits is 432000, while the sum is 43.

Adding to 231215106425605 its reverse (506524601512132), we get a palindrome (737739707937737).

The spelling of 231215106425605 in words is "two hundred thirty-one trillion, two hundred fifteen billion, one hundred six million, four hundred twenty-five thousand, six hundred five".