1111613551 has 2 divisors, whose sum is σ = 1111613552. Its totient is φ = 1111613550.

The previous prime is 1111613543. The next prime is 1111613557. The reversal of 1111613551 is 1553161111.

It is a strong prime.

It is an emirp because it is prime and its reverse (1553161111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111613551 - 2³ = 1111613543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111613557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555806775 + 555806776.

It is an arithmetic number, because the mean of its divisors is an integer number (555806776).

Almost surely, 2^1111613551 is an apocalyptic number.

1111613551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111613551 is an equidigital number, since it uses as much as digits as its factorization.

1111613551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450, while the sum is 25.

The square root of 1111613551 is about 33340.8690798545. The cubic root of 1111613551 is about 1035.9002648805.

Adding to 1111613551 its reverse (1553161111), we get a palindrome (2664774662).

The spelling of 1111613551 in words is "one billion, one hundred eleven million, six hundred thirteen thousand, five hundred fifty-one".