100315621 has 16 divisors (see below), whose sum is σ = 118542976. Its totient is φ = 83094336.

The previous prime is 100315609. The next prime is 100315661. The reversal of 100315621 is 126513001.

It is a cyclic number.

It is not a de Polignac number, because 100315621 - 2⁷ = 100315493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100315661) 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 15 ways as a sum of consecutive naturals, for example, 39430 + ... + 41896.

It is an arithmetic number, because the mean of its divisors is an integer number (7408936).

Almost surely, 2^100315621 is an apocalyptic number.

It is an amenable number.

100315621 is a deficient number, since it is larger than the sum of its proper divisors (18227355).

100315621 is a wasteful number, since it uses less digits than its factorization.

100315621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668.

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

The square root of 100315621 is about 10015.7686175351. The cubic root of 100315621 is about 464.6466981418.

Adding to 100315621 its reverse (126513001), we get a palindrome (226828622).

The spelling of 100315621 in words is "one hundred million, three hundred fifteen thousand, six hundred twenty-one".