243522226091 has 2 divisors, whose sum is σ = 243522226092. Its totient is φ = 243522226090.

The previous prime is 243522226037. The next prime is 243522226109. The reversal of 243522226091 is 190622225342.

It is a happy number.

Together with next prime (243522226109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243522226091 - 2²² = 243518031787 is a prime.

It is a super-2 number, since 2×243522226091² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (243522226291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121761113045 + 121761113046.

It is an arithmetic number, because the mean of its divisors is an integer number (121761113046).

Almost surely, 2^243522226091 is an apocalyptic number.

243522226091 is a deficient number, since it is larger than the sum of its proper divisors (1).

243522226091 is an equidigital number, since it uses as much as digits as its factorization.

243522226091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 243522226091 in words is "two hundred forty-three billion, five hundred twenty-two million, two hundred twenty-six thousand, ninety-one".