220431101 has 4 divisors (see below), whose sum is σ = 240470304. Its totient is φ = 200391900.

The previous prime is 220431053. The next prime is 220431109. The reversal of 220431101 is 101134022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220431101 - 2⁶ = 220431037 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 (220431109) 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, 10019585 + ... + 10019606.

It is an arithmetic number, because the mean of its divisors is an integer number (60117576).

Almost surely, 2^220431101 is an apocalyptic number.

It is an amenable number.

220431101 is a deficient number, since it is larger than the sum of its proper divisors (20039203).

220431101 is a wasteful number, since it uses less digits than its factorization.

220431101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20039202.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 220431101 is about 14846.9222736566. The cubic root of 220431101 is about 604.0751308162.

Adding to 220431101 its reverse (101134022), we get a palindrome (321565123).

The spelling of 220431101 in words is "two hundred twenty million, four hundred thirty-one thousand, one hundred one".