420332931 has 12 divisors (see below), whose sum is σ = 628084080. Its totient is φ = 270558960.

The previous prime is 420332921. The next prime is 420332947. The reversal of 420332931 is 139233024.

It is a happy number.

It is not a de Polignac number, because 420332931 - 2⁶ = 420332867 is a prime.

It is a super-2 number, since 2×420332931² = 353359545766101522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420332895 and 420332904.

It is not an unprimeable number, because it can be changed into a prime (420332911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 804975 + ... + 805496.

It is an arithmetic number, because the mean of its divisors is an integer number (52340340).

Almost surely, 2^420332931 is an apocalyptic number.

420332931 is a deficient number, since it is larger than the sum of its proper divisors (207751149).

420332931 is a wasteful number, since it uses less digits than its factorization.

420332931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610506 (or 1610503 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 420332931 is about 20502.0226075380. The cubic root of 420332931 is about 749.0850656474.

Adding to 420332931 its reverse (139233024), we get a palindrome (559565955).

The spelling of 420332931 in words is "four hundred twenty million, three hundred thirty-two thousand, nine hundred thirty-one".