2101563551 has 2 divisors, whose sum is σ = 2101563552. Its totient is φ = 2101563550.

The previous prime is 2101563517. The next prime is 2101563599. The reversal of 2101563551 is 1553651012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101563551 - 2¹⁰ = 2101562527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101563251) 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, 1050781775 + 1050781776.

It is an arithmetic number, because the mean of its divisors is an integer number (1050781776).

Almost surely, 2^2101563551 is an apocalyptic number.

2101563551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101563551 is an equidigital number, since it uses as much as digits as its factorization.

2101563551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 2101563551 is about 45842.8135153156. The cubic root of 2101563551 is about 1280.8969037360.

The spelling of 2101563551 in words is "two billion, one hundred one million, five hundred sixty-three thousand, five hundred fifty-one".