100522561 has 4 divisors (see below), whose sum is σ = 100756224. Its totient is φ = 100288900.

The previous prime is 100522537. The next prime is 100522577. The reversal of 100522561 is 165225001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 165225001 = 3469 ⋅47629.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100522561 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100522501) 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, 116185 + ... + 117046.

It is an arithmetic number, because the mean of its divisors is an integer number (25189056).

Almost surely, 2^100522561 is an apocalyptic number.

It is an amenable number.

100522561 is a deficient number, since it is larger than the sum of its proper divisors (233663).

100522561 is an equidigital number, since it uses as much as digits as its factorization.

100522561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233662.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 100522561 is about 10026.0940051448. The cubic root of 100522561 is about 464.9659835601.

Adding to 100522561 its reverse (165225001), we get a palindrome (265747562).

The spelling of 100522561 in words is "one hundred million, five hundred twenty-two thousand, five hundred sixty-one".