611120551 has 2 divisors, whose sum is σ = 611120552. Its totient is φ = 611120550.

The previous prime is 611120519. The next prime is 611120561. The reversal of 611120551 is 155021116.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 611120551 - 2⁵ = 611120519 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611120561) 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, 305560275 + 305560276.

It is an arithmetic number, because the mean of its divisors is an integer number (305560276).

Almost surely, 2^611120551 is an apocalyptic number.

611120551 is a deficient number, since it is larger than the sum of its proper divisors (1).

611120551 is an equidigital number, since it uses as much as digits as its factorization.

611120551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 611120551 is about 24720.8525540686. The cubic root of 611120551 is about 848.6115977584.

Adding to 611120551 its reverse (155021116), we get a palindrome (766141667).

It can be divided in two parts, 6111 and 20551, that added together give a palindrome (26662).

The spelling of 611120551 in words is "six hundred eleven million, one hundred twenty thousand, five hundred fifty-one".