1121523551 has 2 divisors, whose sum is σ = 1121523552. Its totient is φ = 1121523550.

The previous prime is 1121523523. The next prime is 1121523581. The reversal of 1121523551 is 1553251211.

It is a weak prime.

It is an emirp because it is prime and its reverse (1553251211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121523551 - 2²² = 1117329247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121523551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121523521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560761775 + 560761776.

It is an arithmetic number, because the mean of its divisors is an integer number (560761776).

Almost surely, 2^1121523551 is an apocalyptic number.

1121523551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121523551 is an equidigital number, since it uses as much as digits as its factorization.

1121523551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1500, while the sum is 26.

The square root of 1121523551 is about 33489.1557224126. The cubic root of 1121523551 is about 1038.9695016280.

Adding to 1121523551 its reverse (1553251211), we get a palindrome (2674774762).

The spelling of 1121523551 in words is "one billion, one hundred twenty-one million, five hundred twenty-three thousand, five hundred fifty-one".