1563425501 has 4 divisors (see below), whose sum is σ = 1705555104. Its totient is φ = 1421295900.

The previous prime is 1563425497. The next prime is 1563425543. The reversal of 1563425501 is 1055243651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1563425501 - 2² = 1563425497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563425581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71064785 + ... + 71064806.

It is an arithmetic number, because the mean of its divisors is an integer number (426388776).

Almost surely, 2^1563425501 is an apocalyptic number.

1563425501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1563425501 is a deficient number, since it is larger than the sum of its proper divisors (142129603).

1563425501 is a wasteful number, since it uses less digits than its factorization.

1563425501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142129602.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 1563425501 is about 39540.1757836254. The cubic root of 1563425501 is about 1160.6262722551.

The spelling of 1563425501 in words is "one billion, five hundred sixty-three million, four hundred twenty-five thousand, five hundred one".