420111431 has 4 divisors (see below), whose sum is σ = 431465832. Its totient is φ = 408757032.

The previous prime is 420111409. The next prime is 420111437. The reversal of 420111431 is 134111024.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 420111431 - 2¹⁰ = 420110407 is a prime.

It is a super-2 number, since 2×420111431² = 352987228913735522, 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 (420111437) 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, 5677145 + ... + 5677218.

It is an arithmetic number, because the mean of its divisors is an integer number (107866458).

Almost surely, 2^420111431 is an apocalyptic number.

420111431 is a deficient number, since it is larger than the sum of its proper divisors (11354401).

420111431 is a wasteful number, since it uses less digits than its factorization.

420111431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11354400.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 420111431 is about 20496.6199896471. The cubic root of 420111431 is about 748.9534624321.

Adding to 420111431 its reverse (134111024), we get a palindrome (554222455).

The spelling of 420111431 in words is "four hundred twenty million, one hundred eleven thousand, four hundred thirty-one".