100213615 has 4 divisors (see below), whose sum is σ = 120256344. Its totient is φ = 80170888.

The previous prime is 100213613. The next prime is 100213637. The reversal of 100213615 is 516312001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 516312001 = 293 ⋅1762157.

It is a cyclic number.

It is not a de Polignac number, because 100213615 - 2¹ = 100213613 is a prime.

It is a super-4 number, since 4×100213615⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100213592 and 100213601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100213613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10021357 + ... + 10021366.

It is an arithmetic number, because the mean of its divisors is an integer number (30064086).

Almost surely, 2^100213615 is an apocalyptic number.

100213615 is a deficient number, since it is larger than the sum of its proper divisors (20042729).

100213615 is an equidigital number, since it uses as much as digits as its factorization.

100213615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20042728.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 100213615 is about 10010.6750521631. The cubic root of 100213615 is about 464.4891526375.

Adding to 100213615 its reverse (516312001), we get a palindrome (616525616).

The spelling of 100213615 in words is "one hundred million, two hundred thirteen thousand, six hundred fifteen".