1551020563 has 2 divisors, whose sum is σ = 1551020564. Its totient is φ = 1551020562.

The previous prime is 1551020531. The next prime is 1551020593. The reversal of 1551020563 is 3650201551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1551020563 - 2⁵ = 1551020531 is a prime.

It is not a weakly prime, because it can be changed into another prime (1551020503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775510281 + 775510282.

It is an arithmetic number, because the mean of its divisors is an integer number (775510282).

Almost surely, 2^1551020563 is an apocalyptic number.

1551020563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551020563 is an equidigital number, since it uses as much as digits as its factorization.

1551020563 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 28.

The square root of 1551020563 is about 39382.9984003250. The cubic root of 1551020563 is about 1157.5484698109.

The spelling of 1551020563 in words is "one billion, five hundred fifty-one million, twenty thousand, five hundred sixty-three".