231551431340405 has 8 divisors (see below), whose sum is σ = 303121873754784. Its totient is φ = 168401040974800.

The previous prime is 231551431340389. The next prime is 231551431340429. The reversal of 231551431340405 is 504043134155132.

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

It is not a de Polignac number, because 231551431340405 - 2⁴ = 231551431340389 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 7 ways as a sum of consecutive naturals, for example, 2105013012131 + ... + 2105013012240.

It is an arithmetic number, because the mean of its divisors is an integer number (37890234219348).

Almost surely, 2^{231551431340405} is an apocalyptic number.

It is an amenable number.

231551431340405 is a deficient number, since it is larger than the sum of its proper divisors (71570442414379).

231551431340405 is a wasteful number, since it uses less digits than its factorization.

231551431340405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210026024387.

The product of its (nonzero) digits is 432000, while the sum is 41.

Adding to 231551431340405 its reverse (504043134155132), we get a palindrome (735594565495537).

The spelling of 231551431340405 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred thirty-one million, three hundred forty thousand, four hundred five".