231140453 has 4 divisors (see below), whose sum is σ = 243305760. Its totient is φ = 218975148.

The previous prime is 231140423. The next prime is 231140477. The reversal of 231140453 is 354041132.

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 231140453 - 2⁶ = 231140389 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 (231140423) 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, 6082625 + ... + 6082662.

It is an arithmetic number, because the mean of its divisors is an integer number (60826440).

Almost surely, 2^231140453 is an apocalyptic number.

It is an amenable number.

231140453 is a deficient number, since it is larger than the sum of its proper divisors (12165307).

231140453 is a wasteful number, since it uses less digits than its factorization.

231140453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12165306.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 231140453 is about 15203.3040159039. The cubic root of 231140453 is about 613.7035752580.

Adding to 231140453 its reverse (354041132), we get a palindrome (585181585).

The spelling of 231140453 in words is "two hundred thirty-one million, one hundred forty thousand, four hundred fifty-three".