421300031 has 2 divisors, whose sum is σ = 421300032. Its totient is φ = 421300030.

The previous prime is 421300027. The next prime is 421300037. The reversal of 421300031 is 130003124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421300031 - 2² = 421300027 is a prime.

It is a super-2 number, since 2×421300031² = 354987432241201922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421299979 and 421300015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421300037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210650015 + 210650016.

It is an arithmetic number, because the mean of its divisors is an integer number (210650016).

Almost surely, 2^421300031 is an apocalyptic number.

421300031 is a deficient number, since it is larger than the sum of its proper divisors (1).

421300031 is an equidigital number, since it uses as much as digits as its factorization.

421300031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 421300031 is about 20525.5945346292. The cubic root of 421300031 is about 749.6591227233.

Adding to 421300031 its reverse (130003124), we get a palindrome (551303155).

The spelling of 421300031 in words is "four hundred twenty-one million, three hundred thousand, thirty-one".