1212551563 has 2 divisors, whose sum is σ = 1212551564. Its totient is φ = 1212551562.

The previous prime is 1212551551. The next prime is 1212551569. The reversal of 1212551563 is 3651552121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212551563 - 2⁹ = 1212551051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212551569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606275781 + 606275782.

It is an arithmetic number, because the mean of its divisors is an integer number (606275782).

Almost surely, 2^1212551563 is an apocalyptic number.

1212551563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212551563 is an equidigital number, since it uses as much as digits as its factorization.

1212551563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 31.

The square root of 1212551563 is about 34821.7110866195. The cubic root of 1212551563 is about 1066.3507332675.

The spelling of 1212551563 in words is "one billion, two hundred twelve million, five hundred fifty-one thousand, five hundred sixty-three".