231533531043469 has 2 divisors, whose sum is σ = 231533531043470. Its totient is φ = 231533531043468.

The previous prime is 231533531043439. The next prime is 231533531043481. The reversal of 231533531043469 is 964340135335132.

231533531043469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180023670944100 + 51509860099369 = 13417290^2 + 7177037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231533531043469 is a prime.

It is a super-2 number, since 2×231533531043469² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231533531043439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115766765521734 + 115766765521735.

It is an arithmetic number, because the mean of its divisors is an integer number (115766765521735).

Almost surely, 2^{231533531043469} is an apocalyptic number.

It is an amenable number.

231533531043469 is a deficient number, since it is larger than the sum of its proper divisors (1).

231533531043469 is an equidigital number, since it uses as much as digits as its factorization.

231533531043469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10497600, while the sum is 52.

The spelling of 231533531043469 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, five hundred thirty-one million, forty-three thousand, four hundred sixty-nine".