231349983 has 4 divisors (see below), whose sum is σ = 308466648. Its totient is φ = 154233320.

The previous prime is 231349961. The next prime is 231349997. The reversal of 231349983 is 389943132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231349983 - 2¹² = 231345887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231349903) 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, 38558328 + ... + 38558333.

It is an arithmetic number, because the mean of its divisors is an integer number (77116662).

Almost surely, 2^231349983 is an apocalyptic number.

231349983 is a deficient number, since it is larger than the sum of its proper divisors (77116665).

231349983 is an equidigital number, since it uses as much as digits as its factorization.

231349983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77116664.

The product of its digits is 139968, while the sum is 42.

The square root of 231349983 is about 15210.1933912755. The cubic root of 231349983 is about 613.8889610590. Note that the first 3 decimals are identical.

The spelling of 231349983 in words is "two hundred thirty-one million, three hundred forty-nine thousand, nine hundred eighty-three".