420211501 has 8 divisors (see below), whose sum is σ = 430900344. Its totient is φ = 409543680.

The previous prime is 420211499. The next prime is 420211529. The reversal of 420211501 is 105112024.

It can be written as a sum of positive squares in 4 ways, for example, as 19811401 + 400400100 = 4451^2 + 20010^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420211501 - 2¹ = 420211499 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 (420211531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40125 + ... + 49501.

It is an arithmetic number, because the mean of its divisors is an integer number (53862543).

Almost surely, 2^420211501 is an apocalyptic number.

420211501 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

420211501 is a deficient number, since it is larger than the sum of its proper divisors (10688843).

420211501 is a wasteful number, since it uses less digits than its factorization.

420211501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 420211501 is about 20499.0609784936. The cubic root of 420211501 is about 749.0129242935.

Adding to 420211501 its reverse (105112024), we get a palindrome (525323525).

The spelling of 420211501 in words is "four hundred twenty million, two hundred eleven thousand, five hundred one".