231335505405 has 24 divisors (see below), whose sum is σ = 406629175680. Its totient is φ = 121641203040.

The previous prime is 231335505403. The next prime is 231335505407. The reversal of 231335505405 is 504505533132.

231335505405 is a `hidden beast` number, since 2 + 31 + 3 + 35 + 50 + 540 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (231335505403) and next prime (231335505407).

It is not a de Polignac number, because 231335505405 - 2¹ = 231335505403 is a prime.

It is a super-2 number, since 2×231335505405² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231335505405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231335505403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36199545 + ... + 36205934.

It is an arithmetic number, because the mean of its divisors is an integer number (16942882320).

Almost surely, 2^231335505405 is an apocalyptic number.

It is an amenable number.

231335505405 is a deficient number, since it is larger than the sum of its proper divisors (175293670275).

231335505405 is a wasteful number, since it uses less digits than its factorization.

231335505405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72405561 (or 72405558 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 36.

The spelling of 231335505405 in words is "two hundred thirty-one billion, three hundred thirty-five million, five hundred five thousand, four hundred five".