231040451 has 4 divisors (see below), whose sum is σ = 241085712. Its totient is φ = 220995192.

The previous prime is 231040441. The next prime is 231040471. The reversal of 231040451 is 154040132.

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 231040451 - 2²⁶ = 163931587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231040441) 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, 5022596 + ... + 5022641.

It is an arithmetic number, because the mean of its divisors is an integer number (60271428).

Almost surely, 2^231040451 is an apocalyptic number.

231040451 is a deficient number, since it is larger than the sum of its proper divisors (10045261).

231040451 is a wasteful number, since it uses less digits than its factorization.

231040451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10045260.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 231040451 is about 15200.0148355191. The cubic root of 231040451 is about 613.6150570187.

Adding to 231040451 its reverse (154040132), we get a palindrome (385080583).

The spelling of 231040451 in words is "two hundred thirty-one million, forty thousand, four hundred fifty-one".