30320531 has 2 divisors, whose sum is σ = 30320532. Its totient is φ = 30320530.

The previous prime is 30320471. The next prime is 30320533. The reversal of 30320531 is 13502303.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30320531 - 2²² = 26126227 is a prime.

It is a super-2 number, since 2×30320531² = 1838669200243922, which contains 22 as substring.

Together with 30320533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30320533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15160265 + 15160266.

It is an arithmetic number, because the mean of its divisors is an integer number (15160266).

Almost surely, 2^30320531 is an apocalyptic number.

30320531 is a deficient number, since it is larger than the sum of its proper divisors (1).

30320531 is an equidigital number, since it uses as much as digits as its factorization.

30320531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 30320531 is about 5506.4081759347. The cubic root of 30320531 is about 311.8259596681.

Adding to 30320531 its reverse (13502303), we get a palindrome (43822834).

The spelling of 30320531 in words is "thirty million, three hundred twenty thousand, five hundred thirty-one".