231330144077 has 2 divisors, whose sum is σ = 231330144078. Its totient is φ = 231330144076.

The previous prime is 231330144049. The next prime is 231330144113. The reversal of 231330144077 is 770441033132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184814869801 + 46515274276 = 429901^2 + 215674^2 .

It is a cyclic number.

It is not a de Polignac number, because 231330144077 - 2¹⁶ = 231330078541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231330147077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115665072038 + 115665072039.

It is an arithmetic number, because the mean of its divisors is an integer number (115665072039).

Almost surely, 2^231330144077 is an apocalyptic number.

It is an amenable number.

231330144077 is a deficient number, since it is larger than the sum of its proper divisors (1).

231330144077 is an equidigital number, since it uses as much as digits as its factorization.

231330144077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 231330144077 in words is "two hundred thirty-one billion, three hundred thirty million, one hundred forty-four thousand, seventy-seven".