100220591 has 16 divisors (see below), whose sum is σ = 108186624. Its totient is φ = 92610144.

The previous prime is 100220581. The next prime is 100220597. The reversal of 100220591 is 195022001.

It is not a de Polignac number, because 100220591 - 2¹⁴ = 100204207 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 (100220597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89165 + ... + 90281.

It is an arithmetic number, because the mean of its divisors is an integer number (6761664).

Almost surely, 2^100220591 is an apocalyptic number.

100220591 is a deficient number, since it is larger than the sum of its proper divisors (7966033).

100220591 is a wasteful number, since it uses less digits than its factorization.

100220591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 100220591 is about 10011.0234741509. The cubic root of 100220591 is about 464.4999302853.

Adding to 100220591 its reverse (195022001), we get a palindrome (295242592).

The spelling of 100220591 in words is "one hundred million, two hundred twenty thousand, five hundred ninety-one".