231500323451461 has 2 divisors, whose sum is σ = 231500323451462. Its totient is φ = 231500323451460.

The previous prime is 231500323451347. The next prime is 231500323451503. The reversal of 231500323451461 is 164154323005132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222543561395236 + 8956762056225 = 14917894^2 + 2992785^2 .

It is a cyclic number.

It is not a de Polignac number, because 231500323451461 - 2¹⁹ = 231500322927173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231500323458461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115750161725730 + 115750161725731.

It is an arithmetic number, because the mean of its divisors is an integer number (115750161725731).

Almost surely, 2^{231500323451461} is an apocalyptic number.

It is an amenable number.

231500323451461 is a deficient number, since it is larger than the sum of its proper divisors (1).

231500323451461 is an equidigital number, since it uses as much as digits as its factorization.

231500323451461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 40.

Adding to 231500323451461 its reverse (164154323005132), we get a palindrome (395654646456593).

The spelling of 231500323451461 in words is "two hundred thirty-one trillion, five hundred billion, three hundred twenty-three million, four hundred fifty-one thousand, four hundred sixty-one".