420144431 has 16 divisors (see below), whose sum is σ = 497448000. Its totient is φ = 347198208.

The previous prime is 420144407. The next prime is 420144433. The reversal of 420144431 is 134441024.

It is a happy number.

It is not a de Polignac number, because 420144431 - 2⁶ = 420144367 is a prime.

It is a super-2 number, since 2×420144431² = 353042685800627522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420144397 and 420144406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420144433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211961 + ... + 213933.

It is an arithmetic number, because the mean of its divisors is an integer number (31090500).

Almost surely, 2^420144431 is an apocalyptic number.

420144431 is a deficient number, since it is larger than the sum of its proper divisors (77303569).

420144431 is a wasteful number, since it uses less digits than its factorization.

420144431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 420144431 is about 20497.4249846170. The cubic root of 420144431 is about 748.9730721637.

Adding to 420144431 its reverse (134441024), we get a palindrome (554585455).

The spelling of 420144431 in words is "four hundred twenty million, one hundred forty-four thousand, four hundred thirty-one".