231243324551 has 8 divisors (see below), whose sum is σ = 244959634944. Its totient is φ = 217539654400.

The previous prime is 231243324523. The next prime is 231243324583. The reversal of 231243324551 is 155423342132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231243324551 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 (231243324251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3122375 + ... + 3195576.

It is an arithmetic number, because the mean of its divisors is an integer number (30619954368).

Almost surely, 2^231243324551 is an apocalyptic number.

231243324551 is a deficient number, since it is larger than the sum of its proper divisors (13716310393).

231243324551 is a wasteful number, since it uses less digits than its factorization.

231243324551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6320121.

The product of its digits is 86400, while the sum is 35.

Adding to 231243324551 its reverse (155423342132), we get a palindrome (386666666683).

The spelling of 231243324551 in words is "two hundred thirty-one billion, two hundred forty-three million, three hundred twenty-four thousand, five hundred fifty-one".