231601849 has 4 divisors (see below), whose sum is σ = 243791440. Its totient is φ = 219412260.

The previous prime is 231601819. The next prime is 231601889. The reversal of 231601849 is 948106132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231601849 - 2⁵ = 231601817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231601819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6094767 + ... + 6094804.

It is an arithmetic number, because the mean of its divisors is an integer number (60947860).

Almost surely, 2^231601849 is an apocalyptic number.

It is an amenable number.

231601849 is a deficient number, since it is larger than the sum of its proper divisors (12189591).

231601849 is a wasteful number, since it uses less digits than its factorization.

231601849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12189590.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 231601849 is about 15218.4706524670. The cubic root of 231601849 is about 614.1116563873. Note that the first 3 decimals are identical.

The spelling of 231601849 in words is "two hundred thirty-one million, six hundred one thousand, eight hundred forty-nine".