420222231 has 36 divisors (see below), whose sum is σ = 718530904. Its totient is φ = 235081440.

The previous prime is 420222211. The next prime is 420222241. The reversal of 420222231 is 132222024.

420222231 is a `hidden beast` number, since 420 + 22 + 223 + 1 = 666.

It is not a de Polignac number, because 420222231 - 2¹⁵ = 420189463 is a prime.

It is a super-2 number, since 2×420222231² = 353173446853234722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420222211) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 685 + ... + 28998.

Almost surely, 2^420222231 is an apocalyptic number.

420222231 is a deficient number, since it is larger than the sum of its proper divisors (298308673).

420222231 is a wasteful number, since it uses less digits than its factorization.

420222231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29724 (or 29710 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 420222231 is about 20499.3226961283. The cubic root of 420222231 is about 749.0192995277.

Adding to 420222231 its reverse (132222024), we get a palindrome (552444255).

It can be divided in two parts, 42022 and 2231, that added together give a triangular number (44253 = T₂₉₇).

The spelling of 420222231 in words is "four hundred twenty million, two hundred twenty-two thousand, two hundred thirty-one".