101823843581 has 2 divisors, whose sum is σ = 101823843582. Its totient is φ = 101823843580.

The previous prime is 101823843577. The next prime is 101823843617. The reversal of 101823843581 is 185348328101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82579217956 + 19244625625 = 287366^2 + 138725^2 .

It is a cyclic number.

It is not a de Polignac number, because 101823843581 - 2² = 101823843577 is a prime.

It is a super-2 number, since 2×101823843581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101823843181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50911921790 + 50911921791.

It is an arithmetic number, because the mean of its divisors is an integer number (50911921791).

Almost surely, 2^101823843581 is an apocalyptic number.

It is an amenable number.

101823843581 is a deficient number, since it is larger than the sum of its proper divisors (1).

101823843581 is an equidigital number, since it uses as much as digits as its factorization.

101823843581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 44.

The spelling of 101823843581 in words is "one hundred one billion, eight hundred twenty-three million, eight hundred forty-three thousand, five hundred eighty-one".