423502031 has 2 divisors, whose sum is σ = 423502032. Its totient is φ = 423502030.

The previous prime is 423502021. The next prime is 423502069. The reversal of 423502031 is 130205324.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423502031 is a prime.

It is a super-2 number, since 2×423502031² = 358707940522249922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 423501994 and 423502012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423502021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211751015 + 211751016.

It is an arithmetic number, because the mean of its divisors is an integer number (211751016).

Almost surely, 2^423502031 is an apocalyptic number.

423502031 is a deficient number, since it is larger than the sum of its proper divisors (1).

423502031 is an equidigital number, since it uses as much as digits as its factorization.

423502031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 423502031 is about 20579.1649733414. The cubic root of 423502031 is about 750.9629296780.

Adding to 423502031 its reverse (130205324), we get a palindrome (553707355).

The spelling of 423502031 in words is "four hundred twenty-three million, five hundred two thousand, thirty-one".