231440053 has 8 divisors (see below), whose sum is σ = 260080128. Its totient is φ = 204348144.

The previous prime is 231440051. The next prime is 231440087. The reversal of 231440053 is 350044132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231440053 - 2¹ = 231440051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231440051) 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 7 ways as a sum of consecutive naturals, for example, 386725 + ... + 387322.

It is an arithmetic number, because the mean of its divisors is an integer number (32510016).

Almost surely, 2^231440053 is an apocalyptic number.

231440053 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

231440053 is a deficient number, since it is larger than the sum of its proper divisors (28640075).

231440053 is a wasteful number, since it uses less digits than its factorization.

231440053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774083.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 231440053 is about 15213.1539465030. The cubic root of 231440053 is about 613.9686178686.

Adding to 231440053 its reverse (350044132), we get a palindrome (581484185).

The spelling of 231440053 in words is "two hundred thirty-one million, four hundred forty thousand, fifty-three".