1563315253 has 2 divisors, whose sum is σ = 1563315254. Its totient is φ = 1563315252.

The previous prime is 1563315251. The next prime is 1563315277. The reversal of 1563315253 is 3525133651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1513443409 + 49871844 = 38903^2 + 7062^2 .

It is a cyclic number.

It is not a de Polignac number, because 1563315253 - 2¹ = 1563315251 is a prime.

Together with 1563315251, 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 (1563315251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781657626 + 781657627.

It is an arithmetic number, because the mean of its divisors is an integer number (781657627).

Almost surely, 2^1563315253 is an apocalyptic number.

It is an amenable number.

1563315253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1563315253 is an equidigital number, since it uses as much as digits as its factorization.

1563315253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40500, while the sum is 34.

The square root of 1563315253 is about 39538.7816327211. The cubic root of 1563315253 is about 1160.5989903384.

The spelling of 1563315253 in words is "one billion, five hundred sixty-three million, three hundred fifteen thousand, two hundred fifty-three".