100513445 has 4 divisors (see below), whose sum is σ = 120616140. Its totient is φ = 80410752.

The previous prime is 100513433. The next prime is 100513447. The reversal of 100513445 is 544315001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544315001 = 2153 ⋅252817.

It can be written as a sum of positive squares in 2 ways, for example, as 72624484 + 27888961 = 8522^2 + 5281^2 .

It is a cyclic number.

It is not a de Polignac number, because 100513445 - 2¹⁰ = 100512421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100513445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100513447) 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, 10051340 + ... + 10051349.

It is an arithmetic number, because the mean of its divisors is an integer number (30154035).

Almost surely, 2^100513445 is an apocalyptic number.

It is an amenable number.

100513445 is a deficient number, since it is larger than the sum of its proper divisors (20102695).

100513445 is an equidigital number, since it uses as much as digits as its factorization.

100513445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20102694.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 100513445 is about 10025.6393811068. The cubic root of 100513445 is about 464.9519278165.

Adding to 100513445 its reverse (544315001), we get a palindrome (644828446).

The spelling of 100513445 in words is "one hundred million, five hundred thirteen thousand, four hundred forty-five".