231398485 has 4 divisors (see below), whose sum is σ = 277678188. Its totient is φ = 185118784.

The previous prime is 231398471. The next prime is 231398501. The reversal of 231398485 is 584893132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65658609 + 165739876 = 8103^2 + 12874^2 .

It is a cyclic number.

It is not a de Polignac number, because 231398485 - 2⁷ = 231398357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23139844 + ... + 23139853.

It is an arithmetic number, because the mean of its divisors is an integer number (69419547).

Almost surely, 2^231398485 is an apocalyptic number.

It is an amenable number.

231398485 is a deficient number, since it is larger than the sum of its proper divisors (46279703).

231398485 is an equidigital number, since it uses as much as digits as its factorization.

231398485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46279702.

The product of its digits is 207360, while the sum is 43.

The square root of 231398485 is about 15211.7876990182. The cubic root of 231398485 is about 613.9318582048.

The spelling of 231398485 in words is "two hundred thirty-one million, three hundred ninety-eight thousand, four hundred eighty-five".