100206553 has 4 divisors (see below), whose sum is σ = 100522980. Its totient is φ = 99890128.

The previous prime is 100206541. The next prime is 100206559. The reversal of 100206553 is 355602001.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38787984 + 61418569 = 6228^2 + 7837^2 .

It is a cyclic number.

It is not a de Polignac number, because 100206553 - 2⁵ = 100206521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100206559) 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, 157738 + ... + 158371.

It is an arithmetic number, because the mean of its divisors is an integer number (25130745).

Almost surely, 2^100206553 is an apocalyptic number.

It is an amenable number.

100206553 is a deficient number, since it is larger than the sum of its proper divisors (316427).

100206553 is an equidigital number, since it uses as much as digits as its factorization.

100206553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316426.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 100206553 is about 10010.3223224829. The cubic root of 100206553 is about 464.4782416135.

Adding to 100206553 its reverse (355602001), we get a palindrome (455808554).

The spelling of 100206553 in words is "one hundred million, two hundred six thousand, five hundred fifty-three".