231553935481669 has 2 divisors, whose sum is σ = 231553935481670. Its totient is φ = 231553935481668.

The previous prime is 231553935481573. The next prime is 231553935481747. The reversal of 231553935481669 is 966184539355132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134121993021025 + 97431942460644 = 11581105^2 + 9870762^2 .

It is a cyclic number.

It is not a de Polignac number, because 231553935481669 - 2¹¹ = 231553935479621 is a prime.

It is a super-2 number, since 2×231553935481669² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231553935481598 and 231553935481607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231553935481069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115776967740834 + 115776967740835.

It is an arithmetic number, because the mean of its divisors is an integer number (115776967740835).

Almost surely, 2^{231553935481669} is an apocalyptic number.

It is an amenable number.

231553935481669 is a deficient number, since it is larger than the sum of its proper divisors (1).

231553935481669 is an equidigital number, since it uses as much as digits as its factorization.

231553935481669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856000, while the sum is 70.

The spelling of 231553935481669 in words is "two hundred thirty-one trillion, five hundred fifty-three billion, nine hundred thirty-five million, four hundred eighty-one thousand, six hundred sixty-nine".