231440942949 has 4 divisors (see below), whose sum is σ = 308587923936. Its totient is φ = 154293961964.

The previous prime is 231440942917. The next prime is 231440942963. The reversal of 231440942949 is 949249044132.

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 231440942949 - 2⁵ = 231440942917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231440942549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38573490489 + ... + 38573490494.

It is an arithmetic number, because the mean of its divisors is an integer number (77146980984).

Almost surely, 2^231440942949 is an apocalyptic number.

It is an amenable number.

231440942949 is a deficient number, since it is larger than the sum of its proper divisors (77146980987).

231440942949 is an equidigital number, since it uses as much as digits as its factorization.

231440942949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77146980986.

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 231440942949 in words is "two hundred thirty-one billion, four hundred forty million, nine hundred forty-two thousand, nine hundred forty-nine".