231303221077 has 2 divisors, whose sum is σ = 231303221078. Its totient is φ = 231303221076.

The previous prime is 231303221069. The next prime is 231303221113. The reversal of 231303221077 is 770122303132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225011717316 + 6291503761 = 474354^2 + 79319^2 .

It is a cyclic number.

It is not a de Polignac number, because 231303221077 - 2³ = 231303221069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231303221477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115651610538 + 115651610539.

It is an arithmetic number, because the mean of its divisors is an integer number (115651610539).

Almost surely, 2^231303221077 is an apocalyptic number.

It is an amenable number.

231303221077 is a deficient number, since it is larger than the sum of its proper divisors (1).

231303221077 is an equidigital number, since it uses as much as digits as its factorization.

231303221077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 31.

The spelling of 231303221077 in words is "two hundred thirty-one billion, three hundred three million, two hundred twenty-one thousand, seventy-seven".