100263561 has 8 divisors (see below), whose sum is σ = 135377280. Its totient is φ = 65996112.

The previous prime is 100263539. The next prime is 100263577. The reversal of 100263561 is 165362001.

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

It is not a de Polignac number, because 100263561 - 2¹⁰ = 100262537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100263521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211290 + ... + 211763.

It is an arithmetic number, because the mean of its divisors is an integer number (16922160).

Almost surely, 2^100263561 is an apocalyptic number.

It is an amenable number.

100263561 is a deficient number, since it is larger than the sum of its proper divisors (35113719).

100263561 is an equidigital number, since it uses as much as digits as its factorization.

100263561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423135.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 100263561 is about 10013.1693783737. The cubic root of 100263561 is about 464.5663062329.

The spelling of 100263561 in words is "one hundred million, two hundred sixty-three thousand, five hundred sixty-one".