231005601 has 10 divisors (see below), whose sum is σ = 345082562. Its totient is φ = 154003680.

The previous prime is 231005539. The next prime is 231005609. The reversal of 231005601 is 106500132.

231005601 is a `hidden beast` number, since 2 + 3 + 100 + 560 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 221861025 + 9144576 = 14895^2 + 3024^2 .

It is not a de Polignac number, because 231005601 - 2¹⁹ = 230481313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231005609) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1425880 + ... + 1426041.

Almost surely, 2^231005601 is an apocalyptic number.

It is an amenable number.

231005601 is a deficient number, since it is larger than the sum of its proper divisors (114076961).

231005601 is an equidigital number, since it uses as much as digits as its factorization.

231005601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851933 (or 2851924 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 231005601 is about 15198.8684118259. The cubic root of 231005601 is about 613.5842030276.

Adding to 231005601 its reverse (106500132), we get a palindrome (337505733).

The spelling of 231005601 in words is "two hundred thirty-one million, five thousand, six hundred one".