231352605 has 60 divisors (see below), whose sum is σ = 455946876. Its totient is φ = 112147200.

The previous prime is 231352603. The next prime is 231352621. The reversal of 231352605 is 506253132.

231352605 is a `hidden beast` number, since 2 + 3 + 1 + 3 + 52 + 605 = 666.

231352605 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 103978809 + 127373796 = 10197^2 + 11286^2 .

It is not a de Polignac number, because 231352605 - 2¹ = 231352603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231352603) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 46645 + ... + 51365.

Almost surely, 2^231352605 is an apocalyptic number.

It is an amenable number.

231352605 is a deficient number, since it is larger than the sum of its proper divisors (224594271).

231352605 is a wasteful number, since it uses less digits than its factorization.

231352605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4760 (or 4740 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 231352605 is about 15210.2795832292. The cubic root of 231352605 is about 613.8912802159.

It can be divided in two parts, 231 and 352605, that added together give a square (352836 = 594²).

The spelling of 231352605 in words is "two hundred thirty-one million, three hundred fifty-two thousand, six hundred five".