231620503635533 has 2 divisors, whose sum is σ = 231620503635534. Its totient is φ = 231620503635532.

The previous prime is 231620503635449. The next prime is 231620503635617. The reversal of 231620503635533 is 335536305026132.

231620503635533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (231620503635449) and next prime (231620503635617).

It can be written as a sum of positive squares in only one way, i.e., 127697525910889 + 103922977724644 = 11300333^2 + 10194262^2 .

It is a cyclic number.

It is not a de Polignac number, because 231620503635533 - 2¹⁴ = 231620503619149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231620503835533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115810251817766 + 115810251817767.

It is an arithmetic number, because the mean of its divisors is an integer number (115810251817767).

Almost surely, 2^{231620503635533} is an apocalyptic number.

It is an amenable number.

231620503635533 is a deficient number, since it is larger than the sum of its proper divisors (1).

231620503635533 is an equidigital number, since it uses as much as digits as its factorization.

231620503635533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374000, while the sum is 47.

The spelling of 231620503635533 in words is "two hundred thirty-one trillion, six hundred twenty billion, five hundred three million, six hundred thirty-five thousand, five hundred thirty-three".