420211431 has 12 divisors (see below), whose sum is σ = 607924408. Its totient is φ = 279701424.

The previous prime is 420211427. The next prime is 420211447. The reversal of 420211431 is 134112024.

420211431 is a `hidden beast` number, since 4 + 20 + 211 + 431 = 666.

It is not a de Polignac number, because 420211431 - 2² = 420211427 is a prime.

It is a super-2 number, since 2×420211431² = 353155293486135522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420211481) 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 11 ways as a sum of consecutive naturals, for example, 30520 + ... + 42093.

Almost surely, 2^420211431 is an apocalyptic number.

420211431 is a deficient number, since it is larger than the sum of its proper divisors (187712977).

420211431 is a wasteful number, since it uses less digits than its factorization.

420211431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73262 (or 73259 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 420211431 is about 20499.0592710983. The cubic root of 420211431 is about 749.0128827026.

Adding to 420211431 its reverse (134112024), we get a palindrome (554323455).

The spelling of 420211431 in words is "four hundred twenty million, two hundred eleven thousand, four hundred thirty-one".