91222511057539 has 2 divisors, whose sum is σ = 91222511057540. Its totient is φ = 91222511057538.

The previous prime is 91222511057467. The next prime is 91222511057543. The reversal of 91222511057539 is 93575011522219.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (93575011522219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91222511057539 - 2⁴³ = 82426418035331 is a prime.

It is a super-3 number, since 3×91222511057539³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (91222511057549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45611255528769 + 45611255528770.

It is an arithmetic number, because the mean of its divisors is an integer number (45611255528770).

Almost surely, 2^{91222511057539} is an apocalyptic number.

91222511057539 is a deficient number, since it is larger than the sum of its proper divisors (1).

91222511057539 is an equidigital number, since it uses as much as digits as its factorization.

91222511057539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701000, while the sum is 52.

The spelling of 91222511057539 in words is "ninety-one trillion, two hundred twenty-two billion, five hundred eleven million, fifty-seven thousand, five hundred thirty-nine".