553515551 has 2 divisors, whose sum is σ = 553515552. Its totient is φ = 553515550.

The previous prime is 553515541. The next prime is 553515553. The reversal of 553515551 is 155515355.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-553515551 is a prime.

Together with 553515553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553515553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276757775 + 276757776.

It is an arithmetic number, because the mean of its divisors is an integer number (276757776).

Almost surely, 2^553515551 is an apocalyptic number.

553515551 is a deficient number, since it is larger than the sum of its proper divisors (1).

553515551 is an equidigital number, since it uses as much as digits as its factorization.

553515551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46875, while the sum is 35.

The square root of 553515551 is about 23526.9112082313. The cubic root of 553515551 is about 821.0632405394.

The spelling of 553515551 in words is "five hundred fifty-three million, five hundred fifteen thousand, five hundred fifty-one".