420637431 has 16 divisors (see below), whose sum is σ = 585525600. Its totient is φ = 268265088.

The previous prime is 420637403. The next prime is 420637439. The reversal of 420637431 is 134736024.

It is not a de Polignac number, because 420637431 - 2⁹ = 420636919 is a prime.

It is a super-2 number, since 2×420637431² = 353871696716559522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420637439) 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, 12696 + ... + 31661.

It is an arithmetic number, because the mean of its divisors is an integer number (36595350).

Almost surely, 2^420637431 is an apocalyptic number.

420637431 is a deficient number, since it is larger than the sum of its proper divisors (164888169).

420637431 is a wasteful number, since it uses less digits than its factorization.

420637431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44498.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 420637431 is about 20509.4473596926. The cubic root of 420637431 is about 749.2659074898.

It can be divided in two parts, 42063 and 7431, that added together give a palindrome (49494).

The spelling of 420637431 in words is "four hundred twenty million, six hundred thirty-seven thousand, four hundred thirty-one".