842313551 has 2 divisors, whose sum is σ = 842313552. Its totient is φ = 842313550.

The previous prime is 842313499. The next prime is 842313587. The reversal of 842313551 is 155313248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 842313551 - 2⁶ = 842313487 is a prime.

It is a Sophie Germain 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 (842313151) 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, 421156775 + 421156776.

It is an arithmetic number, because the mean of its divisors is an integer number (421156776).

Almost surely, 2^842313551 is an apocalyptic number.

842313551 is a deficient number, since it is larger than the sum of its proper divisors (1).

842313551 is an equidigital number, since it uses as much as digits as its factorization.

842313551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The square root of 842313551 is about 29022.6385947246. The cubic root of 842313551 is about 944.4042421329.

Adding to 842313551 its reverse (155313248), we get a palindrome (997626799).

The spelling of 842313551 in words is "eight hundred forty-two million, three hundred thirteen thousand, five hundred fifty-one".