231601605 has 32 divisors (see below), whose sum is σ = 388212480. Its totient is φ = 117680640.

The previous prime is 231601603. The next prime is 231601613. The reversal of 231601605 is 506106132.

It is not a de Polignac number, because 231601605 - 2¹ = 231601603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231601603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95751 + ... + 98139.

It is an arithmetic number, because the mean of its divisors is an integer number (12131640).

Almost surely, 2^231601605 is an apocalyptic number.

It is an amenable number.

231601605 is a deficient number, since it is larger than the sum of its proper divisors (156610875).

231601605 is a wasteful number, since it uses less digits than its factorization.

231601605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 231601605 is about 15218.4626358907. The cubic root of 231601605 is about 614.1114407251. Note that the first 3 decimals are identical.

Adding to 231601605 its reverse (506106132), we get a palindrome (737707737).

The spelling of 231601605 in words is "two hundred thirty-one million, six hundred one thousand, six hundred five".