1563213725 has 6 divisors (see below), whose sum is σ = 1938385050. Its totient is φ = 1250570960.

The previous prime is 1563213671. The next prime is 1563213727. The reversal of 1563213725 is 5273123651.

1563213725 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 18645124 + 1544568601 = 4318^2 + 39301^2 .

It is not a de Polignac number, because 1563213725 - 2⁶ = 1563213661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563213727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31264250 + ... + 31264299.

It is an arithmetic number, because the mean of its divisors is an integer number (323064175).

Almost surely, 2^1563213725 is an apocalyptic number.

It is an amenable number.

1563213725 is a deficient number, since it is larger than the sum of its proper divisors (375171325).

1563213725 is an equidigital number, since it uses as much as digits as its factorization.

1563213725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62528559 (or 62528554 counting only the distinct ones).

The product of its digits is 37800, while the sum is 35.

The square root of 1563213725 is about 39537.4977078722. The cubic root of 1563213725 is about 1160.5738651341.

The spelling of 1563213725 in words is "one billion, five hundred sixty-three million, two hundred thirteen thousand, seven hundred twenty-five".