145531563 has 8 divisors (see below), whose sum is σ = 194098128. Its totient is φ = 96993024.

The previous prime is 145531537. The next prime is 145531597. The reversal of 145531563 is 365135541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145531563 - 2¹⁴ = 145515179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145531523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14895 + ... + 22647.

It is an arithmetic number, because the mean of its divisors is an integer number (24262266).

Almost surely, 2^145531563 is an apocalyptic number.

145531563 is a deficient number, since it is larger than the sum of its proper divisors (48566565).

145531563 is an equidigital number, since it uses as much as digits as its factorization.

145531563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14013.

The product of its digits is 27000, while the sum is 33.

The square root of 145531563 is about 12063.6463393122. The cubic root of 145531563 is about 525.9999843379. Note that the first 4 decimals are identical.

The spelling of 145531563 in words is "one hundred forty-five million, five hundred thirty-one thousand, five hundred sixty-three".