42651563 has 4 divisors (see below), whose sum is σ = 42758328. Its totient is φ = 42544800.

The previous prime is 42651551. The next prime is 42651569. The reversal of 42651563 is 36515624.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42651563 - 2⁸ = 42651307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42651569) 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, 52781 + ... + 53582.

It is an arithmetic number, because the mean of its divisors is an integer number (10689582).

Almost surely, 2^42651563 is an apocalyptic number.

42651563 is a deficient number, since it is larger than the sum of its proper divisors (106765).

42651563 is a wasteful number, since it uses less digits than its factorization.

42651563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106764.

The product of its digits is 21600, while the sum is 32.

The square root of 42651563 is about 6530.8164114450. The cubic root of 42651563 is about 349.3909489403.

The spelling of 42651563 in words is "forty-two million, six hundred fifty-one thousand, five hundred sixty-three".