30420431 has 2 divisors, whose sum is σ = 30420432. Its totient is φ = 30420430.

The previous prime is 30420419. The next prime is 30420433. The reversal of 30420431 is 13402403.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30420431 - 2²² = 26226127 is a prime.

It is a super-2 number, since 2×30420431² = 1850805244451522, which contains 22 as substring.

Together with 30420433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30420433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210215 + 15210216.

It is an arithmetic number, because the mean of its divisors is an integer number (15210216).

Almost surely, 2^30420431 is an apocalyptic number.

30420431 is a deficient number, since it is larger than the sum of its proper divisors (1).

30420431 is an equidigital number, since it uses as much as digits as its factorization.

30420431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30420431 is about 5515.4719652991. The cubic root of 30420431 is about 312.1680519985.

Adding to 30420431 its reverse (13402403), we get a palindrome (43822834).

The spelling of 30420431 in words is "thirty million, four hundred twenty thousand, four hundred thirty-one".