100550545 has 4 divisors (see below), whose sum is σ = 120660660. Its totient is φ = 80440432.

The previous prime is 100550543. The next prime is 100550561. The reversal of 100550545 is 545055001.

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 70157376 + 30393169 = 8376^2 + 5513^2 .

It is a cyclic number.

It is not a de Polignac number, because 100550545 - 2¹ = 100550543 is a prime.

It is a super-2 number, since 2×100550545² = 20220824199594050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100550543) 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, 10055050 + ... + 10055059.

It is an arithmetic number, because the mean of its divisors is an integer number (30165165).

Almost surely, 2^100550545 is an apocalyptic number.

It is an amenable number.

100550545 is a deficient number, since it is larger than the sum of its proper divisors (20110115).

100550545 is an equidigital number, since it uses as much as digits as its factorization.

100550545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20110114.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 100550545 is about 10027.4894664617. The cubic root of 100550545 is about 465.0091261168.

The spelling of 100550545 in words is "one hundred million, five hundred fifty thousand, five hundred forty-five".