11185215541 has 2 divisors, whose sum is σ = 11185215542. Its totient is φ = 11185215540.

The previous prime is 11185215473. The next prime is 11185215577. The reversal of 11185215541 is 14551258111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10994361316 + 190854225 = 104854^2 + 13815^2 .

It is a cyclic number.

It is not a de Polignac number, because 11185215541 - 2²¹ = 11183118389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11185215497 and 11185215506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11185215941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5592607770 + 5592607771.

It is an arithmetic number, because the mean of its divisors is an integer number (5592607771).

Almost surely, 2^11185215541 is an apocalyptic number.

It is an amenable number.

11185215541 is a deficient number, since it is larger than the sum of its proper divisors (1).

11185215541 is an equidigital number, since it uses as much as digits as its factorization.

11185215541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8000, while the sum is 34.

The spelling of 11185215541 in words is "eleven billion, one hundred eighty-five million, two hundred fifteen thousand, five hundred forty-one".