250563561 has 8 divisors (see below), whose sum is σ = 353736864. Its totient is φ = 157216320.

The previous prime is 250563553. The next prime is 250563563. The reversal of 250563561 is 165365052.

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

It is not a de Polignac number, because 250563561 - 2³ = 250563553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (250563563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2456455 + ... + 2456556.

It is an arithmetic number, because the mean of its divisors is an integer number (44217108).

Almost surely, 2^250563561 is an apocalyptic number.

It is an amenable number.

250563561 is a deficient number, since it is larger than the sum of its proper divisors (103173303).

250563561 is a wasteful number, since it uses less digits than its factorization.

250563561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4913031.

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

The square root of 250563561 is about 15829.1996323251. The cubic root of 250563561 is about 630.4335312793.

It can be divided in two parts, 2505 and 63561, that added together give a palindrome (66066).

The spelling of 250563561 in words is "two hundred fifty million, five hundred sixty-three thousand, five hundred sixty-one".