231541655605 has 16 divisors (see below), whose sum is σ = 299741695344. Its totient is φ = 170688245760.

The previous prime is 231541655603. The next prime is 231541655621. The reversal of 231541655605 is 506556145132.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2528681796 + 229012973809 = 50286^2 + 478553^2 .

It is not a de Polignac number, because 231541655605 - 2¹ = 231541655603 is a prime.

It is a super-2 number, since 2×231541655605² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231541655603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3049306 + ... + 3124315.

It is an arithmetic number, because the mean of its divisors is an integer number (18733855959).

Almost surely, 2^231541655605 is an apocalyptic number.

It is an amenable number.

231541655605 is a deficient number, since it is larger than the sum of its proper divisors (68200039739).

231541655605 is a wasteful number, since it uses less digits than its factorization.

231541655605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6174216.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 231541655605 in words is "two hundred thirty-one billion, five hundred forty-one million, six hundred fifty-five thousand, six hundred five".