420431101 has 4 divisors (see below), whose sum is σ = 420667900. Its totient is φ = 420194304.

The previous prime is 420431071. The next prime is 420431113. The reversal of 420431101 is 101134024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 344288025 + 76143076 = 18555^2 + 8726^2 .

It is a cyclic number.

It is not a de Polignac number, because 420431101 - 2⁹ = 420430589 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 (420431161) 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, 115716 + ... + 119293.

It is an arithmetic number, because the mean of its divisors is an integer number (105166975).

Almost surely, 2^420431101 is an apocalyptic number.

It is an amenable number.

420431101 is a deficient number, since it is larger than the sum of its proper divisors (236799).

420431101 is a wasteful number, since it uses less digits than its factorization.

420431101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236798.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 420431101 is about 20504.4166217915. The cubic root of 420431101 is about 749.1433781193.

Adding to 420431101 its reverse (101134024), we get a palindrome (521565125).

The spelling of 420431101 in words is "four hundred twenty million, four hundred thirty-one thousand, one hundred one".