1010555551 has 2 divisors, whose sum is σ = 1010555552. Its totient is φ = 1010555550.

The previous prime is 1010555549. The next prime is 1010555591. The reversal of 1010555551 is 1555550101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1010555551 - 2¹ = 1010555549 is a prime.

Together with 1010555549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010555521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505277775 + 505277776.

It is an arithmetic number, because the mean of its divisors is an integer number (505277776).

Almost surely, 2^1010555551 is an apocalyptic number.

1010555551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010555551 is an equidigital number, since it uses as much as digits as its factorization.

1010555551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3125, while the sum is 28.

The square root of 1010555551 is about 31789.2364016502. The cubic root of 1010555551 is about 1003.5062091297.

It can be divided in two parts, 10105 and 55551, that added together give a palindrome (65656).

The spelling of 1010555551 in words is "one billion, ten million, five hundred fifty-five thousand, five hundred fifty-one".