100443532261 has 2 divisors, whose sum is σ = 100443532262. Its totient is φ = 100443532260.

The previous prime is 100443532229. The next prime is 100443532279. The reversal of 100443532261 is 162235344001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87104668225 + 13338864036 = 295135^2 + 115494^2 .

It is an emirp because it is prime and its reverse (162235344001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100443532261 - 2⁵ = 100443532229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100443532201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50221766130 + 50221766131.

It is an arithmetic number, because the mean of its divisors is an integer number (50221766131).

Almost surely, 2^100443532261 is an apocalyptic number.

It is an amenable number.

100443532261 is a deficient number, since it is larger than the sum of its proper divisors (1).

100443532261 is an equidigital number, since it uses as much as digits as its factorization.

100443532261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 100443532261 its reverse (162235344001), we get a palindrome (262678876262).

The spelling of 100443532261 in words is "one hundred billion, four hundred forty-three million, five hundred thirty-two thousand, two hundred sixty-one".